| Code | Name | Region |
|---|---|---|
| GBTDS | Tadcaster | NYK |
| GBTAD | Taddiport | DEV |
| GBTDY | Tadley | HAM |
| GBTDW | Tadworth | SRY |
| GBTFW | Taff's Well | CRF |
| GBTIN | Tain | HLD |
| GBTKY | Takeley | ESS |
| GBTEZ | Talbot Green | RCT |
| GBTLN | Talmine | HLD |
| GBTAA | Talsarnau | GWN |
| GBTYB | Tal-y-bont | CGN |
| GBTAN | Tal-y-llyn | GWN |
| GBTAM | Tameside | TAM |
| GBTAW | Tamworth | STS |
| GBTDG | Tandragee | ARM |
| GBTGM | Tangmere | WSX |
| GBSWM | Swanmore | HAM |
| GBSWB | Swanscombe | KEN |
| GBSWA | Swansea | SWA |
| GBAWC | Swanwick | DBY |
| GBSWK | Swanwick | HAM |
| GBSWG | Swatragh | MFT |
| GBSW4 | Swavesey | CAM |
| GBSQW | Sway | HAM |
| GBSYT | Swaythling | STH |
| GBESE | Swestern | LEC |
| GBSII | Swillington | ERY |
| GBSDB | Swinderby | LIN |
| GBSW8 | Swindon | SWD |
| GBSNN | Swindon | WIL |
| GBISD | Swineshead | LIN |
| GBINO | Swinton | ROT |
| GBSWT | Swinton | SCB |
| GBSWN | Swinton | SLF |
| GBYRO | Swynnerton | STS |
| GBYDE | Syde | GLS |
| GBSUR | Surbiton | KTT |
| GBUTC | Sutcombe | DEV |
| GBSUO | Sutton | CAM |
| GBSUS | Sutton | STN |
| GBSNB | Sutton Benger | WIL |
| GBSBO | Sutton Bonnington | NTT |
| GBPSB | Sutton Bridge | LIN |
| GBSUC | Sutton Coldfield | BIR |
| GBSUA | Sutton In Ashfield | NTT |
| GBSRE | Sutton On Trent | NTT |
| GBSSJ | Sutton Saint James | LIN |
| GBSUV | Sutton Valence | KEN |
| GBSWV | Sutton Weaver | STN |
| GBWOB | Suttonheath |