| Code | Name | Region |
|---|---|---|
| GBBDA | Birkdale | SFT |
| GBBRK | Birkenhead | WRL |
| GBKSA | Birkenshaw | YOR |
| GBBHM | Birmingham | BIR |
| GBRSB | Birsay | ORK |
| GBBZL | Birstall | KIR |
| GBBDU | Biddulph | STS |
| GBBID | Bideford | |
| GBBAV | Bidford | WAR |
| GBBDO | Bidston | WRL |
| GBBDS | Bieldside | ABD |
| GBBGX | Biggar | SLK |
| GBBQH | Biggin Hill | SRY |
| GBBIW | Biggleswade | CBF |
| GBBBH | Bilborough | NTT |
| GBBIL | Billericay | ESS |
| GBBSQ | Billesdon | LEC |
| GBUGH | Billingborough | LIN |
| GBIGE | Billinge | LAN |
| GBBHW | Billingham | STT |
| GBBHY | Billinghay | LIN |
| GBBGT | Billingshurst | WSX |
| GBNTB | Bilsington | |
| GBBTP | Bilsthorpe | NTT |
| GBBIS | Bilston | WLV |
| GBBOZ | Bilton | NYK |
| GBBET | Bethesda | PEM |
| GBXHA | Bethesda | PEM |
| GBBTG | Bethnal Green/london | TWH |
| GBETY | Betley | STS |
| GBTWN | Bettws Newydd | MON |
| GBBXC | Betws-y-coed | |
| GBBYH | Betws-yn-rhos | CWY |
| GBBEV | Beverley | ERY |
| GBEEB | Bewdley | WOR |
| GBBXB | Bexhill | ESX |
| GBBEX | Bexley | BEX |
| GBBXL | Bexleyheath | BEX |
| GBBXW | Bexwell | NFK |
| GBBIC | Bicester | OXF |
| GBBIH | Bickenhill | SOL |
| GBBKQ | Bicker | LIN |
| GBBQQ | Bickington | |
| GBBKL | Bickley | BRY |
| GBBIA | Bicknacre | ESS |
| GBBDE | Biddenden | KEN |
| GBYBF | Bere Ferrers | DEV |
| GBBGI | Bere Regis | DOR |
| GBBFL | Berinsfield | OXF |
| GBBKE | Berkeley | GLS |