[HN Gopher] UK Address Oddities (2018)
       ___________________________________________________________________
        
       UK Address Oddities (2018)
        
       Author : rwmj
       Score  : 97 points
       Date   : 2023-10-09 10:46 UTC (12 hours ago)
        
 (HTM) web link (paulplowman.com)
 (TXT) w3m dump (paulplowman.com)
        
       | dcminter wrote:
       | I used to live in a New Road that ended in a gate onto a farm.
       | Then the farmer sold the land for development and a furtherance
       | of the road was built with access from the opposite direction.
       | The gate remained and is firmly locked. So it became necessary to
       | explain when calling for a taxi that they should find us on "Old
       | New Road, not new New Road." I rather hope those get perpetuated
       | into signage at some point...
        
       | comprev wrote:
       | I worked for a company once who dealt exclusively with UK address
       | data. We compiled it from dozens of sources then cleaned,
       | organised it and became a reputable source of truth.
       | 
       | Our end clients were large companies, such as
       | utilities/marketing, who sent in their (incomplete/wrong) data -
       | and were provided with healthy data.
       | 
       | Such data was used for validating buildings, for example a gas
       | company checking for fraud or voting registration.
       | 
       | I learned a great deal about something so often overlooked!
        
       | simonjgreen wrote:
       | This reminds me of one of my favourite articles. Falsehoods
       | programmers believe about addresses.
       | https://www.mjt.me.uk/posts/falsehoods-programmers-believe-a...
        
       | sdflhasjd wrote:
       | One oddity not mentioned here that I came across recently, (which
       | probably would go into one of those "things programmers don't
       | know about postcodes" blog posts).
       | 
       | A system that used Postcodes for geocoding (not a great idea) was
       | choking on PO Box codes that belong to districts (such as W1A in
       | the London W district), but don't really correspond to actual
       | street addresses.
       | 
       | This also catches some people out who will unintentionally use
       | the PO Box postcode alongside the full street address of a
       | business for example.
       | 
       | I've also worked on the TV Licensing systems (yes, the one that
       | sends you scary letters every year). That has its own database of
       | postcodes and addresses and I got to spend lots of time on the
       | funny rules there.
        
         | garblegarble wrote:
         | >That has its own database of postcodes and addresses and I got
         | to spend lots of time on the funny rules there.
         | 
         | How come the separate database vs the Postcode Address File?
         | Sounds like you could write an interesting "Things programmers
         | mistakenly believe about UK addresses" post very easily :-)
        
           | f4c39012 wrote:
           | In a word, licensing.
        
           | TazeTSchnitzel wrote:
           | The postcode address file is for places you can deliver mail,
           | whereas TV licensing is interested in places that might have
           | a TV. There must be some cases where there's no overlap.
        
       | am_lu wrote:
       | Not sure if Diamond Geezer is reading this forum, he may be, some
       | of his blog posts get reposted in here and sometimes mentions
       | extra 100k views. https://diamondgeezer.blogspot.com
        
       | Doctor_Fegg wrote:
       | The most brainfuckery'd UK address oddity I've encountered is a
       | road in North Manchester which has the same house number twice on
       | the same road in the same settlement. In other words, there's two
       | houses legitimately called something like "280 Manchester Road,
       | Frogstall".
       | 
       | This is because the village is split between two borough
       | councils, and each started from 1 when numbering their street. So
       | one of them is "280 Manchester Road, Frogstall, Rochdale, Greater
       | Manchester" and the other is "280 Manchester Road, Frogstall,
       | Oldham, Greater Manchester".
       | 
       | Exasperatingly I can't find the exact address again.
        
         | bloak wrote:
         | 443 Manchester Road. See https://paulplowman.com/stuff/house-
         | address-twins-proximity/
        
           | Doctor_Fegg wrote:
           | That's it - thank you!
        
         | cwmma wrote:
         | In Boston (Massachusetts USA) there are two different 24 School
         | Streets, the other one is in a community that were annexed by
         | Boston, so you'd say 24 School St Jamaica Plain but saying
         | "Boston" isn't wrong either. For a long time Google Maps for
         | some reason didn't store the zip code when you put this as your
         | work address and would simply choose whichever one was closest
         | to the destination.
        
         | marssaxman wrote:
         | I used to live on a street like this in Seattle: three blocks
         | from its northern end, the numbering scheme resets and begins
         | counting back up. Seven houses in the northern section
         | therefore share their numbers with houses twelve blocks south.
         | Mine was not one of them, but I got many calls from confused
         | delivery drivers all the same, looking on the wrong section of
         | the street for my seemingly-nonexistent house.
        
       | ralferoo wrote:
       | Slightly off-topic, but the address system in Venice is
       | fascinating. It's divided into 6 regions, and each building is
       | numbered sequentially within that region regardless of what
       | street it's in. Sounds weird, but I still remember the address of
       | an amazing pizza place I ate at almost 20 years ago: Pizzeria
       | Jazz Club Novocento at San Polo 900.
        
         | TazeTSchnitzel wrote:
         | That sounds a bit like the block-based (rather than street-
         | based) addressing used for cities in some parts of the world
         | (at least Japan).
        
       | AJRF wrote:
       | I lived in a big tower in London a year ago and during my stay
       | there my postcode changed twice. Many systems, for example Credit
       | Checking agencies, etc very much do not like this and it's such a
       | pain to deal with.
       | 
       | It got a new postcode because there were too many delivery points
       | for my initial assigned postcode so they split it. Twice.
        
         | simonjgreen wrote:
         | The underlying system behind this is Royal Mails augmentation
         | of the UPRN system with the UDPRN (Unique delivery point
         | reference number) which is meant to be 1:1. There is then a
         | further classification for multitenant units called the UMPRN
         | (unique multiple residence number)
        
       | michaelt wrote:
       | One of the interesting things about UK addresses is the Royal
       | Mail issues an official list of all the addresses they know of -
       | the "PAF" - as part of their work assigning postcodes to
       | buildings.
       | 
       | That means in the UK it's possible to almost definitively
       | identify, for example, the longest address.
       | 
       | Whereas in other countries that question is unanswerable, because
       | who's to say whether a given building's address is "32 Vassar St,
       | Cambridge MA" or whether it's "Massachusetts Institute of
       | Technology Computer Science & Artificial Intelligence Laboratory,
       | 32 Vassar St, Cambridge MA" ?
        
         | simonjgreen wrote:
         | Also incredibly useful is UPRN and USRN for properties and
         | streets. Almost* every property has a unique identifier which
         | is portable across systems.
         | 
         | *I believe the top of the funnel for the UPRN process is
         | council tax registration which not all buildings need
        
           | michaelt wrote:
           | Yep, the reason I hedged my statement, saying " _almost_
           | definitively identify ", is that, as you say, some buildings
           | aren't listed.
           | 
           | For example some village halls aren't listed in PAF - perhaps
           | because they can't receive mail? And structures like
           | electrical transformers aren't listed (even when they're
           | built of brick and on their own separate plot of land).
           | 
           | New build properties _supposedly_ appear in the PAF before
           | construction is completed - but that depends on both the
           | builder, and the PAF user getting the latest updates.
        
             | tialaramex wrote:
             | PAF isn't strictly a list of addresses in the sense anybody
             | other than the Post Office (and maybe parcel delivery
             | firms) would care about.
             | 
             | PAF is a list of _delivery points_ to which they can
             | deliver mail. So for example the place I work isn 't
             | listed, you can't deliver mail to it even though it's a
             | large building with multiple entrances and you'd obviously
             | be able to direct people here specifically, but mail "for
             | us" goes to some admin building several minutes walk away
             | across campus.
        
           | M2Ys4U wrote:
           | >I believe the top of the funnel for the UPRN process is
           | council tax registration which not all buildings need
           | 
           | UPRNs are issued for structures that aren't houses or even
           | buildings.
           | 
           | 10010457355 is Stonehenge, for example, and 10022990231 is
           | the Angel of the North.
        
             | g_p wrote:
             | Indeed - there are even UPRNs for bus stops,
             | defibrillators, and post boxes.
             | 
             | I have also seen lamp posts, EV chargers and fibre
             | infrastructure street cabinets receive them. No need to be
             | a house or building!
        
         | Doctor_Fegg wrote:
         | One of the depressing things about UK addresses is that this
         | list isn't open data.
        
           | robertlagrant wrote:
           | The Post Office isn't great, but the ONS maintains a postcode
           | list[0] that is open.
           | 
           | [0] https://geoportal.statistics.gov.uk/datasets/ons-
           | postcode-di...
        
           | mtmail wrote:
           | And some of the usable (still not open) files exclude
           | Northern Ireland so it's GB not UK data really.
        
           | mnahkies wrote:
           | Energy performance certificates are open though
           | https://epc.opendatacommunities.org/ which includes address
           | and, in some cases UPRN (unique property reference number)
           | 
           | It's also a pretty interesting dataset to explore
        
         | [deleted]
        
       | [deleted]
        
       | SeanLuke wrote:
       | > You might assume that the lowest house number would be 1, but
       | there are quite a few houses numbered zero.
       | 
       | In Richmond, VA, there is a historic building which at present is
       | owned by the Black History Museum. It is 00 Clay Street. That's
       | _two_ zeros. It 's the coolest address I know of.
       | 
       | https://www.nps.gov/places/00-clay-street.htm
        
       | NGRhodes wrote:
       | My parents house was built before development of the area. The
       | original road was built on and another road built on the other
       | side of the house, both the old and current street names are
       | still valid postal streets (the old street name is still attached
       | to the house on the end). The old street name is commonly used to
       | refer to the terrace of houses. My parents still have legal right
       | of access (recorded on the deeds) across the back gardens of the
       | houses that were built on top of the old road.
        
       | dan-robertson wrote:
       | These are all quite fun oddities. The one about house number and
       | post code being insufficient is reasonably obvious if you've
       | lived in a village in the uk where it's pretty common for houses
       | to not have numbers (only names like 'the old school house') and
       | later be split up into two semi-detached houses hence getting
       | separate numbers leaving the village with lots of number 1 or 2
       | houses.
       | 
       | So far I've already lived in places where a number+postcode were
       | insufficient, where one building had multiple postcodes, on a
       | one-word street, and I worked at an '& a half' address. The
       | street number thing I've noticed is mostly that as buildings have
       | grown since the numberings were introduced, they became much less
       | sequential so you see a lot more round numbers - buildings would
       | rather be number 20 than 19 (and they'd really like to be number
       | one), for example.
        
       | eruci wrote:
       | That's why geocoding is HARD. Try "3 Adne Edle Street, London" on
       | Bing maps, Google Maps, Openstreetmap, Geocode.xyz - and more.
       | 
       | Or even better, try "Minus Two, Woodend Lane, Cam, Stroud"
       | 
       | No two geocoding services agree on the correct answer.
        
       | MissTake wrote:
       | I remember as a young girl growing up being proud that the little
       | village I lived in was in the Guinness Book of Records for the
       | highest postal address of 2679 Stratford Road, B94 5NH.
       | 
       | Gobsmacked to read, now half away around the globe, that 50 years
       | later that's still more or less the case...
        
       | KwanEsq wrote:
       | >Or why a house in Owls Green, a village of about 20 houses near
       | Ipswich, would be numbered 2820 (cute).
       | 
       | For those who aren't native British/English-speaking, this is
       | presumably a cute reference to the village's name of *Owls*
       | Green, since at least in the UK the onomatopoeia for one of an
       | owl's sounds is "too-wit too-woo", to which "two-eight two-oh" is
       | similar sounding.
        
         | gertrunde wrote:
         | A moderately tangential weird fact...
         | 
         | "too-wit too-woo" sort of isn't the sound of an owl... it's the
         | sound of two tawny owls, it's a female call (the 'too-wit' bit)
         | followed by a male response! :)
         | 
         | (Ref: https://www.wildlifetrusts.org/wildlife-
         | explorer/birds/birds... )
        
         | globular-toast wrote:
         | Ah... I didn't get it. I even put the number into Wolfram Alpha
         | to see if it had a nice factorisation or something.
        
       | carstenhag wrote:
       | I'm glad that in Germany it's not as weird as in the UK then...
       | we only sometimes have postal issues on newly zoned areas.
        
         | Havoc wrote:
         | Despite the oddities it is actually quite nice in practice.
         | 
         | Almost all websites are hooked into this so filling out an
         | address is usually just type in your postcode & select your
         | flat number from the list.
        
       | sandworm101 wrote:
       | An article about strange house numbers in Britain that doesn't
       | mention 221B? How many other _addresses_ have a _controversy_
       | section in their Wikipedia entry.
       | 
       | https://en.wikipedia.org/wiki/221B_Baker_Street
        
       | doublesocket wrote:
       | I did a bunch of analysis of UK addresses at a former job. My
       | favourite was the clear inverse correlation between house number
       | and value, with a noticeable dip for number 13s, which from
       | memory were valued around 2.5% lower than where they should have
       | been.
        
         | f4c39012 wrote:
         | Some UK streets don't have a #13, i believe because 13 is
         | widely considered unlucky
        
           | darkclouds wrote:
           | [dead]
        
           | justincormack wrote:
           | Yes I lived in such a street, 1at number 11. 1960s street.
        
         | neilo40 wrote:
         | I live in an Edwardian street and my house should have been 13
         | except it isn't. They skipped it and my house is 15 instead.
         | Hopefully the universe doesn't spot this deceit!
        
           | dan-robertson wrote:
           | Perhaps the story is that there is some bias in the streets
           | which have number 13s instead of skipping like on your street
           | and that's the reason for the price difference?
        
           | alexwasserman wrote:
           | Now I'm curious about the ratio of houses numbered 13 and 12a
           | (then 14 with no 13) across the UK.
        
             | justincormack wrote:
             | Our street just went from 11 to 15.
        
             | ralferoo wrote:
             | Generally, we have odd on one side and even on the other,
             | so this isn't likely.
             | 
             | The odds and evens are usually also allocated sequentially
             | and independently, so it can be incredibly annoying when
             | you're looking at the numbers on the wrong side of the road
             | thinking you're getting close when you're actually walking
             | away from the house because the numbers are much higher or
             | lower on the other side.
        
       | denton-scratch wrote:
       | I don't know how many streets named "Letsby Avenue" there are in
       | the UK; but apparently there are at least three different police
       | stations on such streets.
       | 
       | NOTE: "Let's be having you" is a cliche Dixon-of-Dock-Green-style
       | exhortation from a policeman to a villain, urging him to give
       | himself up; c.f. "It's a fair cop, guv".
        
         | comprev wrote:
         | "Named in the late 1990s, Letsby Avenue is a quarter-mile
         | stretch of road in Tinsley which is home to the South Yorkshire
         | Police Operations Complex."
         | 
         | https://www.thestar.co.uk/news/people/perfectly-named-addres...
        
       | mrb wrote:
       | The house numbered "9156" is most likely a data entry typo where
       | two digits were swapped, and the correct number is "1956". That
       | would make sense especially because the other house number are
       | "below 2000" as the author claims.
       | 
       | Edit: the alleged address is: 9156 Mill Ln, Ilketshall St Andrew,
       | Beccles NR34 8JL, UK
       | 
       | In the dataset of all UK property sales since 1995
       | (http://prod.publicdata.landregistry.gov.uk.s3-website-eu-wes...)
       | there are other houses on that street but their "street numbers"
       | are names like "CHERRY TREES" or "BLACKSMITHS" and that one house
       | is "9156". So I don't immediately see where the other houses
       | numbered "below 2000" are. Maybe not on Mill Ln, but other
       | streets? In any case, Google maps has two street numbers for the
       | house: 9156 but also 56:
       | https://www.google.com/maps/place/56+Mill+Ln,+Beccles+NR34+8...
        
       | Rygian wrote:
       | One "weird numbering scheme" according to the article is setting
       | house numbers based on distance (in meters) from a predefined
       | "street start" point.
       | 
       | I find this arrangement to be the most convenient one, and I've
       | found it quite often in villages in France.
       | 
       | No need for "bis" or "3a" or "3 1/2" house numbers, and a
       | consistent method to obtain the position of a house based on its
       | house number.
        
         | madeofpalk wrote:
         | Many addresses in slightly-more-rural Australia work like this.
         | The road I grew up on was numbered by the 10s of metres from
         | the main road. 192 was 1.92 KM from the main road.
        
         | ColinWright wrote:
         | I believe they do that in at least some areas of New Zealand.
        
           | andylynch wrote:
           | They do indeed - it's called RAPID (Rural Address Property
           | IDtification) and is used in most rural areas. For instance a
           | house 5.5 km down a road on the left will be 501. Makes it
           | very easy to find places, all you need is a working odometer.
        
             | Ekaros wrote:
             | Also avoids oddities when multiple buildings are build
             | between existing ones at some later point. As there is
             | usually plenty of space to add them.
        
         | mytailorisrich wrote:
         | In France, I believe that distance from town hall is used to
         | pick which end of a street is to be no. 1. But then numbers
         | incrementally follow from there.
         | 
         | Distance is not used to rank each property.
        
         | euroderf wrote:
         | In rural Finland you'll often see 100 house numbers per
         | kilometer. Alternating even & odd, you'd get a number every 20
         | meters, which is more than sufficient. I'd think this is really
         | handy for emergency services, when people don't bother to put
         | up house numbers on dirt roads.
        
         | pluies wrote:
         | It is indeed used quite a lot in France, and it's great but...
         | For extra confusion my parent's street starts with straight
         | numbers (1, 2, 3...), _then_ switches to distance-based count!
         | So that on one side of the road, we get houses 43, 45, 47, then
         | suddenly 947, and on the other side 64, 66, 68... then 920.
        
         | nerdponx wrote:
         | This is increasingly how exits are numbered on highways in the
         | USA Interstate system. So exit 52 is about 52 miles from the
         | start of the highway or the state border. It works well because
         | exits are rarely spaced close together. And if they do need to
         | put exits close together, usually they letter suffixes like
         | 52A.
        
           | mauvehaus wrote:
           | Here in Vermont, we're half-assing that conversion: the
           | canonical exit number is sequential, but below the sign at
           | the exit you have something like "Milepoint Exit 38". It
           | drives me nuts.
           | 
           | Another truly perverse thing is that if you're on I-91, the
           | exits for I-89 have numbers (10 A and B). On the other hand,
           | if you're on I-89, there are no exit numbers for the I-91
           | exits. What? How?!
        
             | eep_social wrote:
             | IIRC I89 exits are numbered starting from 1 at the border
             | with NH which happens to be just east of that interchange.
             | Maybe adding a number for I91 would have forced them to
             | renumber every other exit across the state and someone
             | decided (for better or worse) to skip that? It's not as if
             | the I89 exit numbers would line up with the I91 ones
             | anyway, that would be even less sensible.
        
         | NeoTar wrote:
         | Isn't this a standard in parts of North America too? Although
         | probably using feet instead of metres.
        
           | ralferoo wrote:
           | From the small number of US cities I've been to, it seems to
           | be 100 numbers per block and roughly divided up between
           | whatever's there. Sometimes evenly spaced, sometimes starting
           | from 1 at one end at 99 at the other and a free for all in
           | the middle.
        
           | madcaptenor wrote:
           | I think that this is usually implemented as a thousand
           | numbers to the mile.
        
         | bestouff wrote:
         | Yes especially in rural areas, where houses are sparsely
         | spaced. If 15 and 17 are 3km apart, you can have several
         | hundreds houses appearing between these numbers, and no amount
         | of "bis" and "ter" will save you.
        
       | zubairq wrote:
       | Another UK Postcode oddity is Gibraltar which has GX111AA as the
       | postcode for the entire country
        
         | donpott wrote:
         | Gibraltar is not a country
        
         | NeoTar wrote:
         | A lot of the British Overseas territories have adopted similar
         | postcodes (e.g. ASCN 1ZZ for Ascension Island)
         | 
         | Although it's disputable whether they are a part of the UK, or
         | separate administrations that have postcodes designed to look
         | like a UK postcode!
        
         | rsynnott wrote:
         | A very extreme variant of this is Hong Kong, a country of over
         | 7 million people, which the Chinese postal service allocates
         | _one_ postcode to. (AIUI this postcode isn't widely used
         | outside of China).
        
           | f4c39012 wrote:
           | Most of the time in HK the postcode of "0" or "00000" is used
           | when a zip code is required
        
         | krisoft wrote:
         | I don't know if that is so odd to me. Gibraltar is 6.8 sq km.
         | The post code where I have grown up in east-europe is roughly 7
         | sq km. So to me that makes perfect sense as a post code.
         | 
         | Is there a rule on how big a post code is supposed to be?
         | 
         | (Now, my current postcode in the UK is just the single house.
         | That for example feels way too small to me.)
        
           | madeofpalk wrote:
           | UK postcodes are usually _extremely_ specific. One postcode
           | per road or even block is very normal.
        
             | gkedzierski wrote:
             | Even more so. Some buildings I lived in had several
             | postcodes. (e.g. some apartments in the building had one
             | postcode assigned, and others had a different one)
        
             | NeoTar wrote:
             | [According to Wikipedia] the aim is to have one post-code
             | per fifteen addresses.
             | 
             | Which means that unlike (5 digit) ZIP codes and German
             | Postal codes, UK Postcodes are typically pretty useful for
             | navigation - people will often enter a postcode into a Sat-
             | Nav to reach a home or business. However, sometimes this
             | can entirely fail - e.g. for a historic house on a large
             | estate which may have access some hundreds of meters away
             | from the postcode indicated location, and so sometimes
             | you'll see a separate postcode to put into your Sat-Nav !
        
         | switch007 wrote:
         | > the entire country
         | 
         | City/overseas territory*
        
       | denton-scratch wrote:
       | How are house numbers allocated on El Camino Real in California?
       | (AKA El Camino BIGNUM) I believe they run to 5 digits; Does every
       | house-number have a house?
        
         | cardiffspaceman wrote:
         | Different municipalities have the same number and street.
         | 
         | You can try it.
         | 
         | 12345 El Camino Real
         | 
         | Can be found in San Diego, Los Altos Hills, and Atascadero.
         | 
         | Real means Royal not double.
        
         | jameshart wrote:
         | And can you address houses one block over by specifying El
         | Camino Imaginary?
        
       | globular-toast wrote:
       | I'd like to know where the one near Beccles is. I used to live
       | there and I'm quite surprised to hear of such an amusing hack
       | nearby. Curious that the other high number one is also in
       | Suffolk, only about 30km away.
       | 
       | Now I'm wondering if it's possible to register an irrational
       | number like Pi. I suppose "Pi" could be a house name but I would
       | want it to be the number.
        
         | blowski wrote:
         | Yes, as a Suffolk resident I'm wondering if there's some
         | special thing about high house numbers.
        
         | julian_t wrote:
         | Some people like having house names as well as a numbers. We
         | live at no.69 and I once entertained the idea of calling it
         | "No. 47", but the idea was quickly vetoed.
         | 
         | (In case you're wondering "why 47?", for some reason our street
         | doesn't have a no.47, so it would have been a fairly benign
         | joke)
        
         | simonbarker87 wrote:
         | I grew up maybe 300m from the Minus One house mentioned in
         | Clacton On Sea and did a paper in that area for a couple of
         | years and never heard of it so I'm wondering how true some of
         | these really are?
        
           | jfk13 wrote:
           | Well, you can read it ("MINUS ONE") on the front of the house
           | if you zoom in on the StreetView photo. And the Royal Mail
           | recognises it (try pasting "minus one, clacton" into
           | https://www.royalmail.com/find-a-postcode).
           | 
           | Though it may be a house name rather than a number.
        
         | rwmj wrote:
         | It's a string so you can probably register anything you like.
         | In our village there are is a road with houses with numbers
         | "<N> Cottages" and "<N>" (for various numbers <N>). I guess
         | post is often misdirected.
        
       | beej71 wrote:
       | I don't know if they still do it, but a cousin of mine in England
       | in the 80s lived in a house with no number. It was simply "The
       | Woodlands" in that particular village.
        
         | rahimnathwani wrote:
         | I have a friend whose address is The Blue House.
        
           | ralferoo wrote:
           | Do you call him The Bear?
        
         | justneedaname wrote:
         | Yeah this is very common in the UK for a house to have a name
         | rather than number, particularly in old villages.
        
       | ekns wrote:
       | When I was living in Edinburgh, I encountered the corner case of
       | the upper levels of an apartment building having a _different
       | postcode_ from the lower levels. Everything online used the same
       | address database so I wondered why I could never find my address
       | under my (presumed) postcode.
        
         | stevekemp wrote:
         | Edinburgh is awesome, in particular, for the way that flats can
         | be numbered within buildings.
         | 
         | I used to live in flat on the top floor which received mail as
         | either "TFL" (for top-floor, flat on the left", or "Flat 6".
         | Different companies used different formats for the address.
         | 
         | I'd lived in GFL "ground-floor, flat left" and "GFR" for
         | "Ground-floor, flat-right" as well. But never in a middle
         | floor. I assume they would be MFL and MFR respectively. But who
         | knows?
        
           | orangewindies wrote:
           | Flats on floors in between usually have the floor number as
           | the first part: "3FL" for third floor on the left or "2F3"
           | for second floor, third flat. Or at least that's how it was
           | when I lived in Edinburgh in the 90s.
        
           | zabzonk wrote:
           | when i lived in edinburgh in the 70s, we would just stick a
           | card on the flat door with the surnames of the inhabitants on
           | it - the flats themselves did not have numbers.
        
             | fellerts wrote:
             | Norwegian apartments are all identified by a single letter
             | and four numbers. For example, H0203 means 2nd floor, 3rd
             | apartment from the left as seen when ascending the stairs.
             | The H means "main floors" (as opposed to the loft or
             | cellar). Very useful when visiting other apartments.
        
             | NeoTar wrote:
             | That is pretty much how it works in Germany - flats are
             | identified by resident surname, and numbers, if they exist,
             | are not known or little used.
        
           | mcdee wrote:
           | They use 1FL/1FR for first floor, 2FL/2FR for second floor,
           | etc.
        
         | secondcoming wrote:
         | My flat in Edinburgh has two official post codes, depending on
         | who is communicating with me.
        
         | tanepiper wrote:
         | When I worked at Scottish Gas, dealing with tenement flats in
         | Edinburgh was always a nightmare because TGB (the old billing
         | system) used the old 1F/2F/3F system but the electricity system
         | used the numbered system - so customers would get mail for both
         | but it would be mixed up all the time.
         | 
         | If you have to deal with a pre-pay meter going in, or just a
         | change in meter they usually screwed up the MPR number with the
         | address and end up replacing the wrong one.
         | 
         | And I lived in Edinburgh for 13 years, mostly in tenement flats
         | - so it was always a hassle.
        
         | jhonsrid wrote:
         | I've seen this done (in England) for blocks of flats where each
         | floor has it's own postcode that matches the floor, eg ZZ1 Z1A
         | through to ZZ1 Z1G (A-G for floor 1 to 7).
        
       | Minor49er wrote:
       | This reminds me of the "What is the minimal possible UK address?"
       | post from earlier this year
       | 
       | https://news.ycombinator.com/item?id=34995370
        
       | gambiting wrote:
       | One other oddity is that there are "magic" postcodes in the UK
       | that map to various government services, for instance:
       | 
       | BX5 5BD
       | 
       | Is a postcode to use when sending mail to HMRC(the UK tax
       | office), but that address doesn't exist anywhere if you try
       | searching for it. Royal Mail is the only company that can deliver
       | post to that address too, they have the internal mapping to know
       | where it needs to go - no other courier company will accept
       | letters to that address. And, annoyingly - Royal Mail's own
       | online postage store doesn't accept it as a valid address, you
       | have to buy stamps and hand-write the address.
        
         | jayflux wrote:
         | I don't think that's true about only Royal Mail can post there.
         | There's clear instructions on gov.uk for all couriers on where
         | to send the mail if they come across this post code, it's not
         | some weird secret.
         | 
         | https://www.gov.uk/government/organisations/hm-revenue-custo...
        
           | gambiting wrote:
           | Yes, but you can't use the BX5 5BD postcode if you do. They
           | give you an alternative address for couriers.
        
       | pdpi wrote:
       | I've been in London for over ten years, and family back in
       | Portugal still struggles with the idea that
       | Flat <number>         <Post code>         UK
       | 
       | is enough to uniquely identify my address.
        
         | rahimnathwani wrote:
         | I grew up in London, in a house that shared a postcode with
         | only _one_ other house.
         | 
         | A school friend didn't believe I would successfully receive
         | mail addressed with only my forename and postcode.
         | 
         | (Until he tried it and I brought the received letter to
         | school.)
        
         | syncsynchalt wrote:
         | Sometimes you don't even need that:
         | https://boingboing.net/2007/01/04/royal-mail-delivers.html
        
           | notahacker wrote:
           | there's an Irish blog dedicated to testing their post service
           | like this https://www.meversusanpost.com
           | 
           | My favourite is still the one addressed to "gobshites", which
           | was delivered to their parliament as the sender intended
        
         | [deleted]
        
         | comprev wrote:
         | Here in Ireland the "Eire Code" is even more accurate than a UK
         | Post Code. Each building has a unique code.
         | 
         | https://www.citizensinformation.ie/en/consumer/phone-interne...
        
       | Shrezzing wrote:
       | I live at flat 8 of building 5, which through a strange quirk in
       | the way addresses are created in my city & then recorded at the
       | post office, accepts mail intended for both 8/5 and 5/8. A nearby
       | neighbour in flat 5 of building 8 also receives mail intended for
       | both 5/8 and 8/5. Most mail providers automatically adjust "flat
       | 5 building 8, street name" to "5/8, street name", so we've got no
       | way of fixing it.
       | 
       | Everyone in the estate who lives in flat 9 or lower in their
       | respective buildings has the same issue, and the issue also
       | occurs in a bunch of other new builds in the city.
        
         | rwmj wrote:
         | I have a friend who lives in a house which was knocked through
         | from two houses. She has two addresses, either work. She also
         | has two gas meters, two electric meters and so on, although she
         | got those disconnected (to save on standing charges).
        
         | sega_sai wrote:
         | Yes, I had the same issue previously. It was constant mixing
         | between flat 1 building 2, vs flat 2 building 1 (2/1 vs 1/2). I
         | think trying to be explicit 'Flat N, M X street' helps instead
         | of using the A/B notation. (although now I leave in 7/7 so I
         | don't care).
        
         | owisd wrote:
         | I lived in a flat where the convention was to write the flat
         | number like 8/5 and would occasionally get mail to the
         | equivalent of 08-May.
        
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