| Active360 Paddleboarding & Canoeing London | Canoe & kayak tour agency | Canalside Activity Centre, Ladbroke Grove | Daily 08:00–19:00 |
| Active360 Paddleboarding Kew | Outdoor activity organiser | Kew Bridge Paddlesports Arch | Mon–Fri 08:00–21:00 |
| Acton Service Centre | Car bodywork mechanic | 17-18 The Broadway, Gunnersbury Ln | Mon–Fri 08:30–17:30 |
| Acuherbs | Herb shop | Station Parade, High St N | Mon–Sat 10:30–19:30 |
| Acuity Tax & Legal | Tax lawyer | 14 Gray's Inn Rd | Mon–Fri 09:00–17:00 |
| ACW | Marketing consultant | Studio 3, 30 Vineyard Path, Mortlake High St | Mon–Fri 09:30–18:00 |
| Ada Windows Ltd | Window supplier | g, 1 Anthony Way | Mon–Fri 08:00–17:00 |
| Adam James Bespoke | Mens tailor | 35 Sackville St | Mon–Fri 09:00–17:30 |
| Adam's Ethiopian Restaurant | Ethiopian restaurant | 86 Brixton Hill | Mon 12:00–22:00 |
| Addis Restaurant | Ethiopian restaurant | 40-42 Caledonian Rd | Fri 17:00–23:00 |
| Admiral Jet | Aircraft rental service | 71, 75 Shelton St | Daily Open 24 hours |
| Adn Contractors Ltd | Arborist service | 67 Fernhead Road, Greater | Daily Open 24 hours |
| Adulis Restaurant | Ethiopian restaurant | 44-46 Brixton Rd | Daily 12:00–00:00 |
| Aerial Days Trapeze and Circus School | Aerial sports center | 101 Croftdown Rd | Mon 18:00–20:45 |
| Aesthetic Beauty Supplies | Beauty products wholesaler | Wimpole House, 1 Bashley Rd | Tue 08:30–17:30 |
| AF Performing Arts - Stratford Drama School | Drama school | Chobham Academy (Temple Mill Lane Entrance, 40 Cheering Ln | Fri 16:30–20:00 |
| AFANDENA Restaurant | Egyptian restaurant | 207 Earls Ct Rd | Daily 12:00–23:00 |
| AFR Refrigeration Ltd | Commercial refrigerator supplier | Unit 5, 6 Smugglers Way | Mon 08:00–17:00 |
| Afro Cabbana | African restaurant | 76 Stewart's Rd | Wed–Fri 17:00–21:00 |
| After Noah | Home goods store | 121-122 Upper St | Mon–Sat 10:00–18:00 |
| Against The Grain Taproom + Cidery | Beer hall | 76 Enid St | Wed–Fri 16:00–22:00 |
| Age UK Shop | Charity shop | 716 High Rd | Mon–Sat 09:00–17:00 |
| Agnes Commclean Ltd | Janitorial service | 14 Bray Dr | Mon 08:00–21:00 |
| AGUK College | Private college | 7 Kirkdale Rd | Mon–Fri 09:00–17:00 |
| Ahwazian Oriental Rug Warehouse | Oriental rug shop | Oriental Rug Warehouse Centre, Ahwazian, 65 Waterloo Rd | Sat 10:00–17:00 |
| Aikido of London | Aikido school | Archway Methodist Church, 6 Archway Rd | Mon 19:00–21:00 |
| AIMA Interiors Contract Furniture, Bespoke Joinery & Interior Fit-out | Interior fitting contractor | 68 Venn St | Mon–Fri 09:00–18:00 |
| Ain't Nothin' But | Blues club | 20 Kingly St | Mon–Wed 17:00–01:00 |
| Air Conditioning Refrigeration Supplies | Air conditioning store | 24b Western Ave | Mon–Thu 08:00–16:00 |
| Airbrush Lucas | Airbrushing service | Studio B, The Greenhouse N16, 49 Green Lanes | Mon–Fri 09:00–17:00 |