| mark | | |
| Markel International Insurance Company Limited | 020 7953 6000 | 49 Leadenhall Street, London, EC3A 2EA |
| Methodist Insurance Company | 0161 817 6525 | Lincoln House, 1 Brazennose Street, Manchester, M2 5FL |
| Mitsui Sumitomo Insurance Co Europe Limited | 020 7977 8321 | 25 Fenchurch Avenue, London, EC3M 5AD, United Kingdom |
| Montpelier Underwriting Agencies Ltd | | |
| MS Amlin Insurance SE (UK Branch) | | |
| MS Amlin Insurance SE (UK Branch) | | |
| MS Amlin Underwriting Limited | | |
| Multi Risk Indemnity Company Limited | | |
| Munich Re Syndicate Ltd | 020 7886 3900 | St. Helens, 1 Undershaft, London, EC3A 8EE, United Kingdom |
