| Code | Name | Region |
|---|---|---|
| GBUKO | Bulkington | WAR |
| GBBUP | Bulpham | THR |
| GBBPH | Bulphan | THR |
| GBBYL | Bulwell/nottingham | NTT |
| GBUNY | Bunbury | CHE |
| GBUNS | Bunessan | AGB |
| GBBUG | Bungay | SFK |
| GBBNB | Bunnahabhain | AGB |
| GBBXY | Bunny | NTT |
| GBOOR | Buntingford | ESX |
| GBBTO | Buntingford | HRT |
| GBUBR | Burbage | LEC |
| GBBBA | Burbage | WIL |
| GBBEU | Bures | SFK |
| GBUFD | Burford | OXF |
| GBBUL | Burgess Hill | WSX |
| GBBYI | Brynsiencyn | AGY |
| GBYBG | Brynteg | AGY |
| GBBE2 | Bubwith | ERY |
| GBUCN | Buchan | |
| GBBKD | Buckden | CAM |
| GBNY2 | Buckden | NYK |
| GBBKA | Buckfast | DEV |
| GBBFG | Buckfastleigh | DEV |
| GBBHV | Buckhaven | FIF |
| GBBHH | Buckhurst Hill | ESS |
| GBBUC | Buckie | MRY |
| GBBUK | Buckingham | BKM |
| GBBBW | Buckland Brewer | DEV |
| GBBCL | Buckley | FLN |
| GBBCR | Buck's Cross | DEV |
| GBZAH | Bucksburn | ABE |
| GBBUD | Bude | CON |
| GBBUA | Budleigh Salterton | |
| GBBWV | Budock Water | CON |
| GBBUB | Bugbrooke | NTH |
| GBBH9 | Broughton | SCB |
| GBBTA | Broughton Astley | LEC |
| GBBFU | Broughton In Furness | CMA |
| GBBGP | Broughton Poggs | OXF |
| GBBYY | Broughty Ferry | DND |
| GBBWS | Brownhills | WLL |
| GBBXN | Broxbourne | HRT |
| GBBXU | Broxburn | WLN |
| GBOTD | Broxted | ESX |
| GBBCH | Bruichladdich | AGB |
| GBRTG | Bruntingthorpe | LEC |
| GBBRU | Bruray, Out Skerries | ZET |
| GBQMV | Bruton | SOM |
| GBBZR | Bryher | CON |