| Bespoke Marquee (LDN) Ltd | Utleie av partytelt | Arch 450 Huddart St | Daily Open 24 hours |
| Betting Sites UK | Software company | 20-22 Wenlock Rd | Daily Open 24 hours |
| Betty & Joan’s | Gay bar | 9 Hewson Wy | Mon–Thu 17:00–00:00 |
| Beyond Retro Dalston | Vintage clothing shop | 92-100 Stoke Newington Rd | Mon–Sat 11:00–19:00 |
| BFI Shop | DVD shop | 0 Belvedere Rd | Daily 12:00–20:00 |
| Big Easy Bar.B.Q & Crabshack - Westfield, Stratford | Barbecue restaurant | 158 Westfield Ave | Mon–Thu 12:00–21:00 |
| Bikram Yoga Canary Wharf | Yoga studio | Beaufort Court, 4 Admirals Way | Mon 06:00–22:00 |
| Billa Scaffolding | Scaffolding service | 55 Winchfield Rd | Daily 05:00–17:00 |
| Bioscan Laboratory | Laboratory | 575 Green Lanes | Mon–Wed 09:00–19:00 |
| Birchgrove Ayrton House | Assisted Living Retirement Home Mill Hill | Assisted living residence | Ridgeway Views Estate, 3 Medawar Dr, The Ridgeway | Daily 09:00–17:00 |
| Birlem Oil | Diesel fuel supplier | 2-10 Markfield Rd | Daily Open 24 hours |
| Biryani Waala | Biryani restaurant | 326 Balham High Rd | Mon–Thu 12:00–23:00 |
| Bisha Eritrean Restaurant | Ethiopian restaurant | 544 Holloway Rd | Daily 13:00–23:00 |
| Bistrotheque | Modern European restaurant | 23-27 Wadeson St | Tue–Thu 18:00–23:30 |
| BKC - Biryani Kebab Chai | Awadhi restaurant | 7 Edgware Rd | Mon–Wed 09:00–22:00 |
| Blackheath | Park and garden | total acres, Missing green colouration of large segment (maybe 50%) of Blackheath Common World Heritage Site (211 acres), London SE13 to | Daily 11:00–20:00 |
| Blackheath Farmers Market | Farmers' market | Blackheath Station car park | Sun 10:00–14:00 |
| Bloomsbury Ballroom | Ballroom | Bloomsbury Square | Mon–Sat 09:00–21:00 |
| Bloomsbury Health Store | Organic shop | 51 Marchmont St | Mon–Fri 09:30–18:30 |
| Bloomsbury Square | Park | Bloomsbury Square | Daily 08:00–20:00 |
| Blossoms Bakehouse | Wedding cake shop | Highcroft | Mon–Fri 10:00–16:00 |
| Blue Anchor Fish & Chips - Kebab House | Fish and chips takeaway | 49 Blue Anchor Ln | Daily 10:30–22:00 |
| Blue Tit Brockley | Hair salon | 258 Brockley Rd | Mon 09:00–18:00 |
| BMB Drylining Ltd. | Building firm | 11 Portland Rd | Daily Open 24 hours |
| Bodha Drinks | Beverage distributor | Unit 3A, 292, 34-35 Hatton Garden | Daily Open 24 hours |
| Body To Body Tantric Massage London | Erotic massage | 6 Manson Pl | Daily 09:00–01:00 |
| Bohemia House | Czech restaurant | 74 W End Ln | Tue–Thu 17:00–22:00 |
| Bola 8 - The Pool Lounge | Sports bar | 122 Elephant Rd | Tue–Wed 17:00–22:00 |
| Bolt Remaps - Adblue Fault Fix | Vehicle tuning service | 571 Cable St | Daily Open 24 hours |
| Bombay Delight | Indian restaurant | Bombay Delight, 271-273 The Broadway | Mon–Fri 11:30–15:00, 17:30–22:30 |