| Code | Name | Region |
|---|---|---|
| GBUPI | Uppingham | RUT |
| GBUPS | Upshire | ESS |
| GBUPN | Upton | CAM |
| GBUOT | Upton | DOR |
| GBUTN | Upton | LIN |
| GBUPT | Upton | SLG |
| GBTLG | Tylers Green | BKM |
| GBTYN | Tyne | NET |
| GBTYM | Tynemouth | NTY |
| GBTYY | Tyseley | BIR |
| GBTYT | Tytherington | GLS |
| GBUCK | Uckfield | ESX |
| GBUDD | Uddingston | SLK |
| GBUFC | Uffculme | DEV |
| GBUFG | Uffington | OXF |
| GBUIG | Uig | HLD |
| GBULY | Ulceby | NLN |
| GBULL | Ullapool | HLD |
| GBULS | Ulsta, Yell | ZET |
| GBULF | Ulva Ferry | AGB |
| GBULV | Ulverston | CMA |
| GBUMB | Umberleigh | DEV |
| GBUNT | Unst | ZET |
| GBUPV | Upavon | WIL |
| GBUHA | Uphall | WLN |
| GBUP3 | Upham | HAM |
| GBTUB | Tunbridge Well | KEN |
| GBTUW | Tunbridge Wells | KEN |
| GBTNL | Tunstall | STS |
| GBTSE | Tunstead | NFK |
| GBJTM | Tupholme | LIN |
| GBTPT | Tupton | DBY |
| GBTBU | Turnberry | SAY |
| GBTFX | Turnford | HRT |
| GBTRF | Turriff | ABD |
| GBTUV | Turvey | MIK |
| GBTUT | Tutbury | STS |
| GBTSI | Tutshill | GLS |
| GBTUX | Tuxford | NTT |
| GBTWC | Twickenham | RIC |
| GBTWY | Twyford | BKM |
| GBTYF | Twyford | HAM |
| GBTWF | Twyford | WOK |
| GBTYC | Tycroes | CMN |
| GBTYD | Tyddewi (st David's) | PEM |
| GBTYL | Tyldesley | WGN |
| GBTTM | Trentham | STE |
| GBTRY | Treorchy | RCT |
| GBTSO | Tresco | CON |
| GBTRC | Trescott | STS |