A BT site engineering code is a group of letters assigned by BT, or its predecessor the General Post Office, to a physical location which is equipped by the company with unusual amounts or types of telecommunication

Telecommunication

Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...

s.

Such codes relate to both BT's own buildings and major customer sites.

Historically, site codes beginning with the letter Q were government or defence sites. Codes beginning with the letter Y were radio-related sites. The latter category broadened somewhat over time to include many other kinds of customer site.

Q

• QADB Bracknell
• QADF Staxton Wold
• QADN Cranwell
• QAEH Stafford
• QAEL Kinloss
• QALD Aldergrove
• QAPA Leconfield
• QBFM Forest Moor
• QBIN Binbrook
• QBTY Bawtry (HQ 1Gp)
• QCEA Carlisle
• QCEN Central
• QCHL Coltishall
• QCON Coningsby
• QCOS Cosford
• QCWL Chilwell
• QDH Dollis Hill (GPO Research Station)
• QFIN Finningley
• QIVM Fylingdales
• QLDM Lindholm & Northern Radar
• QLIN Linton
• QLMG Leeming
• QMET Kelvedon Hatch bunker (originally RAF Fighter Command 'Metropolitan Sector')
• QMHA North Luffenham
• QNCC Lindholme (840SU)
• QNLO Preston
• QNTH Northwood
• QNWC RAF North West Signals Centre
• QOUS Ouston
• QPLY Plymouth
• QPTE Pitreavie
• QQAT Aldershot
• QQCC Corsham
• QQFS Neatishead
• QQGR Boulmer
• QQGU Anstruther
• QQJD Hack Green
• QQNB Craigie Hall
• QRAA Boddington
• QSCM Scampton
• QTOP Topcliffe
• QUTA York Mil
• QVCA Glen Parva
• QWAC Harrogate
• QWAD Waddington
• QWAH RAF High Wycombe
• QWHI Whitehall

Y

• YABR Albrighton
• YACW Arncliffe Wood
• YBAI Bagshot (Surrey Hill)
• YBCA Benbecula
• YBCL Blackcastle Hill
• YBFL Blackford Hill
• YBFM Charwelton
• YBGT Burngate
• YBMR British Telecom Tower (Birmingham)
  British Telecom Tower (Birmingham)
  The BT Tower is a landmark in Birmingham, England, and is also the tallest building in the city. Its Post Office code was YBMR.-History:...
  
  
• YBNM Burnham
• YBNP Blaen Plwyf
• YBRA Barra
• YBRX Bruxie Hill
• YBTH Butser Hill
• YBUD Bury Down
• YBUR Burnhope
• YBYB Ballymena
• YCAG Caister
• YCAM Cambret Hill
• YCAW Mount Stamper
• YCBC Corby's Crag
• YCBY Claxby
• YCHI Chillerton Down
  Chillerton Down transmitting station
  The Chillerton Down transmitter is a broadcasting facility for FM and DAB radio at Chillerton Down on the Isle of Wight off the south coast of England...
  
  
• YCLC Cullercoats New Radio Station
• YCMB Cambelt Hill
• YCOK Copt Oak
• YCOR Core Hill
• YCOZ Connel
• YCRA Craiglockhart Hill
• YCRG Craigowl Hill
• YCRR Corstorphine Hill Radio Stn. R. Site Bot.
• YCRT Corstorphine Hill Radio Stn. T. Site Bot.
• YCSM Five Ways
• YCSP Carlton Scroop
• YCSR Kelsall NATS station
• YCVW Cave Wold
• YDAC Dalton-in-Furness
• YDMH Deadmans Hill
• YDOG Douglas Radio Stn. Transmit Hut
• YDOR Dorchester
• YEAH East Harptree
• YECR Elstree Apparatus Room (BBC)
• YELM East Lomond Radio Station
• YFAS Fairseat
• YFAY Farley
• YFLW Flimwell
• YFOR Forder Battery
• YGFW Greenford
• YGHD Great Hatfield
• YGKP Greenock
• YGLB Gallanach Beg.
• YGOO Goosemoor
• YGOY Goonhilly
  Goonhilly Satellite Earth Station
  Goonhilly Satellite Earth Station is a large telecommunications site located on Goonhilly Downs near Helston on the Lizard peninsula in Cornwall, England, UK. Owned by BT Group plc, it was at one time the largest satellite earth station in the world, with more than 25 communications dishes in use...
  
  
• YGPT Golden Pot
• YGRH Granite Hill
• YGRL Green Lowther
• YHAL Halwell
• YHAV Haverfordwest
• YHEA Heaton Park
• YHEY Heysham
• YHIL Hillingdon
• YHLY Hornsea
• YHMG Horwich
• YHTS Hunters Stones
• YHWD Harrow Weald
• YINS Inskip
• YKEL Kelvedon Hatch
• YKIL Kilchiaran
• YKMV Kirtomy
• YKSH Kirk o'Shotts
  Kirk o'Shotts transmitting station
  The Kirk o'Shotts transmitting station is a broadcasting and telecommunications site at The Hirst which lies just outside the village of Salsburgh which is near the town of Shotts in North Lanarkshire central Scotland...
  
  
• YKSH/WT Kirk O'Shotts BT
• YKUW Kirkby Underwood
• YLFM Lonely Farm
• YLLG Llanllawddog
• YLST Lochinver R/S/Radio Stn.
• YLTH Lowther Hill
• YMAA Maaruig
• YMAG Mallaig
• YMLG Melvaig
• YMNM Mendlesham
  Mendlesham transmitting station
  The Mendlesham transmitting station is a broadcasting and telecommunications facility, situated close to the village of Mendlesham, near the town of Stowmarket, in Suffolk, United Kingdom . It is owned and operated by Arqiva....
  
  
• YMOR Morborne Hill
• YMUG Muggleswick
  Muggleswick
  Muggleswick is a village and civil parish in County Durham, England. It is situated a few miles to the west of Consett.The village has a number of farms and domestic dwellings as well as the Church of England church, generally accepted as dedicated to All Saints, and village hall . Amenities other...
  
  
• YOKM Oakham
• YOVR Over
• YPCG Pencarreg
• YPGN Pye Green
  Pye Green BT Tower
  Pye Green BT Tower is a 388 ft tall, telecommunication tower built of reinforced concrete at Pye Green, Staffordshire, England . Standing in Cannock Chase it is one of the few telecommunication towers in the United Kingdom built of reinforced concrete...
  
  
• YPLC Pimlico
• YPPK Portpatrick Coastal Radio Station
• YPRE Preseli
• YPRH Proctor Heights
• YPTP Pontop Pike
• YPUR Purdown
  Pur Down BT Tower
  Purdown BT Tower was built in 1970 and is located on a hill just north of the city centre of Bristol, in the Lockleaze suburb, UK . It is a prominent landmark, visible from much of the city. It is one of twelve reinforced concrete towers owned by BT in the UK...
  
  
• YQNR Quernmore
• YRID Riddings Hill
• YRIN Manchester (Ringway) Airport
• YRIV Rivington Pike (Winter Hill Broadcast TX)
• YRSM Rosemarkie
• YRXR Rothesay SHF Radio Stn.
• YSBR St. Albans
• YSBY Sibleys
• YSCN Sutton Common
  Sutton Common BT Tower
  Sutton Common BT Tower is a radio tower built of reinforced concrete at Macclesfield, Cheshire, England. It is one of the few communication towers in the United Kingdom built of reinforced concrete...
  
  
• YSHC Stoke Holy Cross
• YSHR Shanes Hill
• YSOM Somerton
• YSPF Sparsholt Firs
• YSRF Sheriff's Mountain R.V. Stn.
• YSRS Skriaig
• YSTK Stokenchurch
• YSTL Stillingfleet
• YSTS Standing Stones
• YSWH Swaffham
• YTAC Tacolneston
• Tatsfield
• YTHH Thornhill
• YTHL Turners Hill
  Turners Hill, West Midlands
  Turners Hill or Turner's Hill is the highest hill in the West Midlands, England, at 271m above sea level. The hill is situated on the border of Dudley and Rowley Regis, in the Metropolitan Borough of Sandwell , in a rural part of the predominantly industrial Black Country.The hill can be seen from...
  
  
• YTHM Tobermory SHF Radio Stn
• YTIL Tinshill
  Tinshill BT Tower
  The Tinshill BT Tower is a telecommunication tower located on the east side of Otley Old Road in the north of Leeds, West Yorkshire, England...
  
  
• YTIR Tirnascobe
• YTNL Thornton-in-Lonsdale
• YTOR Tor Sliasg
• YTOW BT Tower
  BT Tower
  The BT Tower is a tall cylindrical building in London, United Kingdom, located at 60 Cleveland Street, Fitzrovia W1T 4JZ, London Borough of Camden. It has been previously known as the Post Office Tower, the London Telecom Tower and the British Telecom Tower. The main structure is tall, with a...
  
  , London
• YTTH Two Top Hill
• YTYC Twycross
• YULL Ullapool
• YUPF Upton
• YWBH Wisbech
• YWCK Wickhambrook
• YWEN Wenallt
  Wenallt Hill
  Wenallt Hill is a hill located in Cardiff, Wales.The residents of Cardiff refer to it as a mountain, though its height restricts it from being declared a mountain...
  
  
• YWFR Werfa
• YWHC Whinfell Common
• YWHK Whitehawk Hill
• YWHN Whitestone
• YWIL Windy Hill
• YWNY Wooler
• YWPE Wotton-under-Edge
  Wotton-under-Edge BT Tower
  Wotton-under-Edge BT Tower is a telecommunication tower built of reinforced concrete at Wotton-under-Edge in Gloucestershire, UK. Wotton-under-Edge BT Tower is one of the few British towers built of reinforced concrete.-See also:...
  
  
• YYGU Guernsey State Radio Stn.
• YZSK Skelton

Z

• ZAK Humber Radio Stn.
• ZAM Anglesey Radio Stn.
• ZBA Bearley Radio Stn.
• ZBD Brentwood Radio Stn.
• ZBY Braewynner Radio Stn.
• ZHO Hopealone Radio Stn.
• ZIF Ilfracombe Radio Stn.