| Code | Name | Region |
|---|---|---|
| GBTVS | Trevellas | CON |
| GBTRZ | Treviscoe | CON |
| GBTLC | Trillick | |
| GBTGR | Trimdon Grange | DUR |
| GBTLY | Trimley Heath | SFK |
| GBTMT | Trimley St. Martin | SFK |
| GBTRI | Tring | HRT |
| GBTOI | Triton | |
| GBTRN | Troon | SAY |
| GBTFF | Trottiscliffe | KEN |
| GBTBG | Trowbridge | WIL |
| GBTRU | Truro | CON |
| GBTDI | Tudweiliog | |
| GBTUO | Tufton | PEM |
| GBTLB | Tullibody | CLK |
| GBTUL | Tulliemet | PKN |
| GBTTR | Totteridge | BNE |
| GBZDH | Tottington | NFK |
| GBTLQ | Totton | HAM |
| GBTVL | Tovil | KEN |
| GBTWW | Tow Law | DUR |
| GBTOW | Towcester | NTH |
| GBTFK | Trafford Park | MAN |
| GBTNT | Tranent | ELN |
| GBTRA | Tranmere | WRL |
| GBTWD | Trawden | LAN |
| GBTRR | Trearddur | AGY |
| GBTDR | Tredegar | BGW |
| GBTFR | Trefforest | RCT |
| GBTRO | Trefor | |
| GBTFS | Treforest | RCT |
| GBTEI | Trefriw | CWY |
| GBTRG | Tregaron | CGN |
| GBTER | Treharris | MTY |
| GBTRH | Treherbert | RCT |
| GBTRW | Trelawnyd | FLN |
| GBTNB | Tonbridge | KEN |
| GBTOG | Tong | BRD |
| GBTNO | Tong | SHR |
| GBTGH | Tongham | SRY |
| GBTGU | Tongue | HLD |
| GBTPY | Tonypandy | RCT |
| GBRCT | Tonyrefail | RCT |
| GBTOO | Toomebridge | ANT |
| GBTLF | Topcliffe | NYK |
| GBTHM | Topsham | |
| GBTBY | Torbay/paignton | TOB |
| GBTPH | Torphichen | WLN |
| GBTPI | Torphins | ABD |
| GBTPO | Torpoint | CON |