| Mercantile Indemnity Company Ltd | 02070688354 | Pro Insurance Solutions Ltd, Southgate House, Southgate Street, Worthing Road, Gloucester, GL1 1UB |
| Methodist Insurance PLC (MIC) | 0161 817 6525 | Benefact House, 2000 Pioneer Avenue, Gloucester Business Park, Brockworth, Gloucester, GL3 4AW, United Kingdom |
| Mitsui Sumitomo Ins Co (Europe) Ltd | 0207 977 8321 | The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AG, United Kingdom |
| MS Amlin Insurance SE (UK Branch) | 0800 085 7944 | The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AG |
| MS Amlin Insurance SE (UK Branch) | | |
| MS Amlin Underwriting Limited | 0800 085 7944 | The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AG |
| Munich Re Syndicate Ltd | 020 7886 3900 | St. Helens, 1 Undershaft, London, EC3A 8EE, United Kingdom |
| Municipal General Insurance Ltd | | |
| Municipal Mutual Insurance | 0207 821 6444 | 23 College Hill, London, EC4R 2RP |
| National Grid Insurance Company Ireland DAC | 00353 1266 6097 | Third Floor, The Metropolitan Building, James Joyce Street, Dublin 1, Dublin, ZZ9 9ZZ, Ireland |
