| 8882 | 123401 | 14-16 Linford Wood House, Milton Keynes, MK14 6XT |
| Accelerant Insurance Limited | | |
| Accredited Insurance (Europe) Limited Live | | |
| Admiral Insurance (Gibraltar) Limited (AIGL) | | |
| AEGIS Syndicate 1225 at Lloyd's | 0207 265 2100 | 33 Gracechurch Street, London, EC3V 0BT, United Kingdom |
| Ageas Insurance (formerly Groupama) | 0870 600 2123 | 1 Port Way, Port Solent, Portsmouth, Hampshire, PO6 4TY, United Kingdom |
| Ageas Insurance Limited | 01452 626000 | Ageas House, The Square, Gloucester Business Park, Brockworth, Gloucestershire, GL3 4AD, United Kingdom |
| AIG Europe S,A, (Ireland branch) | | |
| Aioi Nissay Dowa Insurance UK Limited | 0345 0704471 | 7th Floor, The Hallmark Building, 52-56 Leadenhall Street, London, EC3A 2EB, United Kingdom |
| alade insurance | 1234 | testers lane, milton keynes, mk14 6xt |
