| Landy Tech Ltd | |
| LaneSystems Ltd | |
| Lang Communications Ltd | |
| Lanner Group Ltd | Warwickshire |
| Lanode Ltd | Surrey |
| Lanonyx Telecom Ltd | Greater Manchester |
| Lansdowne Telecom | Wiltshire |
| Lantech Networks | Merseyside |
| Lantech Solutions | |
| Lanterne | |
| Lantum | |
| Lanware | |
| Lapse | |
| Laptop Repair Birmingham | |
| Laptop Repair Welwyn & Hatfield | |
| Laptop Spares Shop Ltd | Lancashire |
| Laptop Specialists | South Yorkshire |
| Laptop Station | |
| Laptop Workshop | West Sussex |
| Laptopbitz Ltd | |
| LaptopParts | Greater Manchester |
| Laptops and Spares | Wiltshire |
| Lapwing Computers | County Durham |
| Larasoft.io Ltd | |
| Laravel Live UK | |
| LaravelUK | |
| Lario Therapeutics Ltd | |
| Laroque Software Ltd | |
| LARS Communications Ltd | Lancashire |
| Lascar Electronics Ltd | Wiltshire |
| Lascom Solutions Ltd | Greater London |
| Laser Business Systems Ltd | Greater London |
| Laser Friend | Derbyshire |
| LaserLines | Buckinghamshire |
| Lastic Ltd | West Midlands |
| Latent Labs | |
| Latent Technology | |
| LateRooms | |
| Latitude Software Design | East Sussex |
| Latitude Strategic Marketing | |
| Laton Technical & Consultancy Services Ltd | East Sussex |
| Latte Social | |
| Launchbay Capital | |
| Launchpad SEO Ltd | |
| Laundromat Media Ltd | |
| Lavanda Ventures Ltd | |
| Laverock Therapeutics | |
| Lavery Rowe | |
| Lawbit Ltd | |
| Lawhive | |