| Name | Sailor ID | Most Recent Declaration |
|---|---|---|
| Mikael Mergui | FRAMM18 | 100.0kg - Professional |
| Julian Metherell | GBRJM241 | 85.0kg - Amateur |
| Guido Miani | MONGM1 | 85.0kg - Amateur |
| Emeric Michel | FRAEM28 | 95.0kg - Amateur |
| Camilla Michelini | ITACM87 | 51.0kg - Amateur |
| Gerry Michell | GBRGM54 | 95.0kg - Professional |
| Owen Middleton | RSAOM1 | 83.0kg - Amateur |
| Steve Milne | IRLSM40 | 114.0kg - Professional |
| Izzy Mitchell | GBRIM46 | 75.0kg - Amateur |
| Sten Mohr | DENSM | 75.0kg - Professional |
| Tom Montgomery | GBRTM78 | 73.0kg - Amateur |
| Dylan Moore | GBRDM68 | 88.0kg - Amateur |
| Ed Moore | GBREM72 | |
| lan Moore | GBRIM21 | 80.0kg - Professional |
| Susie Moore | GBRSM116 | |
| Stevie Morisson | GBRSM24 | 80.0kg - Professional |
| Roger Morris | GBRRM22 | 84.0kg - Amateur |
| Dom Mortimer | GBRDM96 | 82.0kg - Amateur |
| Udo Moser | AUTUM1 | 85.0kg - Uncategorized |
| Richard Moxey | GBRRM128 | 67.0kg - Amateur |
| Derek Moynan | IRLDM48 | 82.0kg - Amateur |
| Fiona Mulcahy | GBRFM33 | 64.0kg - Amateur |
| Jan willem Mulier | NEDJH61 | 85.0kg - Amateur |
| James Murphy | IRLJM120 | |
| Tommy Murphy | IRLTM36 | 97.0kg - Amateur |