| Code | Name | Region |
|---|---|---|
| GBWOG | Wood Green | HRY |
| GBWBG | Woodbridge | SFK |
| GBWOY | Woodbury | |
| GBWSA | Woodbury Salterton | DEV |
| GBWOC | Woodchester | GLS |
| GBWUH | Woodchurch | KEN |
| GBWOZ | Wollaston | NTH |
| GBWTY | Witley | SRY |
| GBWVC | Wolvercote | OXF |
| GBWIN | Witney | OXF |
| GBWOV | Wolverhampton | WLV |
| GBWSH | Wittersham | KEN |
| GBWVT | Wolverton | BKM |
| GBTTN | Witton | BIR |
| GBWUF | Wolvey | HAM |
| GBWON | Witton | NFK |
| GBWCM | Wiveliscombe | SOM |
| GBWVF | Wivelsfield Green | ESX |
| GBWIV | Wivenhoe | ESS |
| GBWIX | Wix | ESS |
| GBWBN | Woburn | BDF |
| GBWOS | Woburn Sands | BKM |
| GBWKG | Woking | SRY |
| GBWOK | Wokingham | WOK |
| GBWOD | Woldingham | SRY |
| GBOTO | Wollaston | DUD |
| GBWTU | Winterbourne | SGC |
| GBWTH | Withnell | LAN |
| GBWEK | Winterbourne Kingston | DOR |
| GBIRO | Winterton | NLN |
| GBINT | Wintringham | NYK |
| GBWIW | Winwick | WRT |
| GBWIR | Wirksworth | DBY |
| GBWRI | Wirral | |
| GBWWA | Wirswall | CHE |
| GBWIS | Wisbech | CAM |
| GBWRR | Wisborough Green | WSX |
| GBWHW | Wishaw | NLK |
| GBISN | Wistaston | CHE |
| GBWCF | Witchford | CAM |
| GBWSL | Winslow | BKM |
| GBWIH | Witham | ESS |
| GBIWN | Winsor | HAM |
| GBWEX | Withernsea | ERY |
| GBWWU | Winterborne | DOR |
| GBWQG | Withington | LAN |
| GBWDM | Windermere | CMA |
| GBWDL | Windlesham | SRY |
| GBWSR | Windsor | WNM |
| GBWNW | Winfrith Newburgh | DOR |