| All About Costumes | Costume hire service | York Rd | Daily Open 24 hours |
| All England Lawn Tennis & Croquet Club | Tennisverein | Church Rd | Daily Open 24 hours |
| All Greens Newington Green, fruits & vegetables London | Fruit and vegetable shop | 109 Newington Green Rd | Daily 07:00–21:00 |
| All Property Claims | Insurance agency | Rm 306, 165 The Broadway | Daily Open 24 hours |
| Allergy Cosmos | Air filter supplier | Unit 42, A, 99-109 Battersea Business Centre, Lavender Hill | Mon–Fri 09:00–20:00 |
| Alpha Guns London (Aldgate) | Shooting range | 63 Gower's Walk | Mon–Thu 12:00–21:00 |
| Alyse Baker Artistry | Hair & Makeup | Make-up artist | 41 Landells Rd | Daily 05:00–21:00 |
| Ama Oil And Gas Limited | Gas shop | Apt 807, 1 St Gabriel Walk | Daily Open 24 hours |
| Ama Sushi | Sushi restaurant | 49A Dartmouth Rd | Daily 12:00–22:00 |
| Amar Gaon | Bangladeshi restaurant | 50 Brick Ln | Daily 12:00–00:00 |
| American Vintage | Clothes market | Stable St | Mon–Sat 11:00–19:00 |
| AMH Pianos Services London | Piano moving service | 1st Floor, 160-164 Gray's Inn Rd | Daily 08:30–22:00 |
| Amira Kitchen | East African restaurant | 26 New Park Rd | Daily 07:00–22:00 |
| Amitabha Garden | Buddhist supplies shop | 10 Wood Wharf | Mon–Fri 09:30–19:30 |
| Amora Imani | Haute couture fashion house | Unit A, 66, 68 Bell St | Daily 11:00–19:00 |
| Ananya Cards | Wedding service | First Floor, Creative ID & Ananya Limited, 85 Great Portland St | Daily Open 24 hours |
| Andrew the Locksmith Harrow | Emergency locksmith service | 43, Lime Court, Tranquil Ln | Mon–Fri 08:00–22:00 |
| Angelina | Asian fusion restaurant | 56 Dalston Ln | Mon–Wed 18:00–23:00 |
| Anjappar Chettinad Restaurant | Chettinad restaurant | 240 High St N | Daily 12:00–23:00 |
| ANNA Womens clothing shop in Primrose Hill | Ladies' clothes shop | 126 Regent's Park Rd | Mon–Sat 10:00–18:00 |
| Annab Brasserie | Libanonilainen ravintola | 803 Fulham Rd. | Mon–Thu 12:00–22:30 |
| Any Rubbish | General contractor | 243 Hither Green Ln | Daily Open 24 hours |
| AORTA UK LTD (Trading as TICKETSTOSEE) | Event ticket seller | Strand) Office, 7 Bell Yard | Mon–Fri 09:30–17:00 |
| Apostolic Shalom Church, House Of Prayer | Apostolic church | St Paul's Way | Sun 14:00–17:00 |
| Ar Aesthetics & Laser | Esthetics service | Rm 1, 91 Westminster Bridge Rd | Mon–Fri 10:00–20:00 |
| Arabian Hammam | Hammam | 441 Edgware Rd | Tue–Sun 11:00–19:30 |
| Aradhana | Saree shop | 211 Upper Tooting Rd | Mon 11:30–17:30 |
| Arch Golf | Indoor golf course | Railton Rd | Daily 07:00–23:00 |
| Archery for All | Archery club | 1212 London Rd | Tue 11:00–12:00 |
| Archway Leisure Centre | Swimming pool | 1 MacDonald Rd | Mon–Fri 06:30–21:30 |