| Code | Name | Region |
|---|---|---|
| GBPTW | Portadown | ARM |
| GBPFY | Portaferry | ARD |
| GBPVD | Portavadie | AGB |
| GBPVG | Portavogie | ARD |
| GBPBA | Portballintrae | MYL |
| GBPRU | Portbury | NSM |
| GBPRC | Portchester | HAM |
| GBONE | Portglenone | ANT |
| GBPOR | Porth | RCT |
| GBPCO | Porth Colmon | |
| GBPCW | Porthcawl | BGE |
| GBPGI | Porthgain | PEM |
| GBPTG | Porthgwarra | CON |
| GBPLV | Porthleven | CON |
| GBPTD | Porthmadog | GWN |
| GBPOH | Porthoustock | CON |
| GBPQL | Pool | LDS |
| GBPOO | Poole | DOR |
| GBPWE | Poolewe | HLD |
| GBPPL | Poplar | TWH |
| GBPRZ | Porlock | SOM |
| GBPAP | Port Appin | AGB |
| GBPAK | Port Askaig | AGB |
| GBPOC | Port Clarence | STT |
| GBPDI | Port Dinorwic | GWN |
| GBPEG | Port Edgar | EDH |
| GBPLN | Port Ellen | AGB |
| GBRTL | Port Erroll | ABD |
| GBPGV | Port Gaverne | CON |
| GBPGG | Port Glasgow | |
| GBPGD | Port Gordon | |
| GBISA | Port Isaac | CON |
| GBPOG | Port Logan | |
| GBPMR | Port Mor, Muck | HLD |
| GBPPE | Port Penrhyn | GWN |
| GBPSM | Port Saint Mary | |
| GBPGT | Polegate | ESX |
| GBPT5 | Polesworth | WAR |
| GBP9G | Poling | WSX |
| GBNGT | Pollington | ERY |
| GBPLL | Pollokshields | GLG |
| GBPLP | Polperro | CON |
| GBPLR | Polruan | |
| GBPLD | Polstead | SFK |
| GBZPO | Polton | MLN |
| GBPOM | Pomeroy | DGN |
| GBPFF | Ponders End | ENF |
| GBPOA | Pontardawe | NTL |
| GBPDL | Pontardulais | SWA |
| GBPOF | Pontefract | WKF |