Exchanges
| Code | Name |
|---|---|
| SLWG | Wragby |
| LWWRA | Wraysbury |
| EAWRE | Wrentham |
| SMWSW | Wrestlingworth |
| WNWX | Wrexham |
| WNWXN | Wrexham North |
| SSWRI | Wrington |
| EAWRI | Writtle |
| SSWGN | Wroughton |
| EAWRO | Wroxham |
| SMWX | Wroxton St Mary |
| WMWYB | Wybunbury |
| WMWYC | Wychbold |
| NDWYE | Wye |
| NEWYL | Wylam |
| SSWYL | Wylye |
| EMWYSWO | Wymeswold |
| EMWMNDH | Wymondham |
| EAWYM | Wymondham (Norfolk) |
| CMWYT | Wythall |
| MRWYT | Wythenshawe |
| SDYPTN | Yapton |
| SMYG | Yardley Gobion |
| EMYARDL | Yardley Hastings |
| SDYRMTH | Yarmouth (Iow) |
| WMYAR | Yarnfield |
| WNYA | Yarpole |
| ESYRF | Yarrowford |
| THY | Yateley |
| SSYAT | Yatton |
| EMYXLEY | Yaxley |
| WWYEAL | Yealmpton |
| WWYELV | Yelverton |
| WWYEOV | Yeovil |
| ESYET | Yetholm |
| WWYETM | Yetminster |
| SWYDU | Ynysddu |
| SWYYN | Ynysowen |
| SWYBL | Ynysybwl |
| WNYO | Yockleton |
| MYYO | York |
| EMYOULG | Youlgrave |
| CMYOX | Yoxall |
| EAYOX | Yoxford |
| NSYTH | Ythanwells |
| WWZELA | Zelah |