 | | | | Av Time | | | Place | Races | 1st | 2nd | 3rd | Trophies | |
Merrifield Clive (Teddington) | 17.5 | | | 6 | 1 | 0 | 0 | 0 | | |
| 2022 | | 17:30:37 | | Merrifield Clive & Shattock Benjamin | Taunton | 6 | | | | | |  |
Merrifield David | 23.5 | | | 36 | 1 | 0 | 0 | 0 | | |
| 1999 | | 23:32:20 | | Southway Michael & Merrifield David | Taunton | 36 | | | | | |  |
Merriman P | 33.2 | | | 31 | 1 | 0 | 0 | 0 | | |
| 1970 | | 33:10:36 | | Merriman P & Sugden G | 3 Para | 31 | | | | | |  |
Merritt Gordon | 26.5 | | | 80 | 3 | 0 | 0 | 0 | | |
| 2014 | | 26:06:23 | | Barton Nick & Merritt Gordon | Wargrave Boat Club | 84 | | | | | |  |
| 2016 | | 26:13:37 | | Merritt Gordon & Barton Nick | Independent | 71 | | | | | |  |
| 2019 | | 27:20:11 | | Merritt Gordon & Whittam Andy | Wargrave Boating Club | 86 | | | | | |  |
Merryfield I L | 52.1 | | | 78 | 1 | 0 | 0 | 0 | | |
| 1983 | | 52:05:06 | | Merryfield I L & Appleby D | Aston Univ. | 78 | | | | | |  |
Mescal Jim | 21.5 | | | 14 | 4 | 0 | 0 | 0 | | |
| 2013 | | 20:49:08 | | Horkan David & Mescal Jim | International | 11 | | | | | European |  |
| 2026 | | 21:47:16 | | Mescal Jim & Murphy Declan | Independent | 15 | | | | | |  |
| 2026 | | 21:47:16 | | Mescal Jim & Murphy Declan | Independent | 15 | | | | | |  |
| 2026 | | 21:47:16 | | Mescal Jim & Murphy Declan | Independent | 15 | | | | | |  |
Mesham D | 24.6 | | | 15 | 1 | 0 | 0 | 0 | | |
| 1969 | | 24:39:32 | | Sansom W & Mesham D | 22 | 15 | | | | | |  |
Mestdagi D | 23.4 | | | 64 | 1 | 0 | 0 | 0 | | |
| 1987 | | 23:22:02 | | D'Huyretter F & Mestdagi D | Harelbeekse Kano Beveniging, Belgium | 64 | | | | | |  |
Meston J | 28.9 | | | 17 | 3 | 0 | 0 | 0 | | |
| 1961 | | 34:30:00 | | Meston J & Middleton P | Royal Marines Forces Volunteer Reserve | 35 | | | | | |  |
| 1962 | | 23:59:00 | | Hodgson R & Meston J | Royal Marines Forces Volunteer Reserve | 4 | | | | | Reserve |  |
| 1964 | FB | 28:12:17 | | Meston J & Swales W | Royal Marines Forces Volunteer Reserve | 12 | | | | | |  |
Metcalf P | 25.4 | | | 78 | 1 | 0 | 0 | 0 | | |
| 1990 | | 25:22:49 | | Matthews G & Metcalf P | Bath Triathlon Club | 78 | | | | | |  |
Metcalfe J | 50.5 | | | 78 | 1 | 0 | 0 | 0 | | |
| 1996 | | 50:32:38 | | Howells J & Metcalfe J | Independent & West Yorkshire Police | 78 | | | | | |  |
Metcalfe Liam | 26.1 | | | 86 | 1 | 0 | 0 | 0 | | |
| 2010 | | 26:06:25 | | Venables Daniel & Metcalfe Liam | JCSC | 86 | | | | | Navy |  |
Metcalfe R J | 22.1 | | | 25 | 1 | 0 | 0 | 0 | | |
| 1980 | | 22:04:35 | | Robbins K & Metcalfe R J | Chippenham | 25 | | | | | |  |
Metcalfe S | 25.6 | | | 22 | 4 | 0 | 0 | 0 | | |
| 1974 | | 32:31:16 | | Metcalfe S & Pilditch M I | Royal Military Col. of Science | 24 | | | | | |  |
| 1975 | | 21:31:32 | | Metcalfe S & Hope N K | Royal Military Col. of Science | 16 | | | | | |  |
| 1976 | | 25:14:05 | | Metcalfe S & Pilditch M I | Royal Military Col. of Science | 17 | | | | | |  |
| 1978 | | 23:10:55 | | Pilditch M I & Metcalfe S | Royal Military Col. of Science | 29 | | | | | |  |
Metcalfe Vicky | 26.0 | | | 64 | 6 | 0 | 0 | 0 | | |
| 2004 | | 27:21:44 | | Blatchley Ian & Metcalfe Vicky | Pangbourne | 57 | | | | | |  |
| 2007 | | 26:06:52 | | Metcalfe Vicky & Thomas Sian Louise | Pangbourne | 64 | | | | | |  |
| 2015 | C2 | 26:27:13 | | Metcalfe Vicky & Murnaghan Liz | Pangbourne & Basingstoke Canal | 87 | | | | | Ladies C2 |  |
| 2016 | C2 | 27:17:14 | | Metcalfe Vicky & Gillespie Janet | Pangbourne | 80 | | | | | Ladies C2 |  |
| 2019 | C2 | 25:01:14 | | Murnaghan Liz & Metcalfe Vicky | Basingstoke Canal & Pangbourne | 65 | | | | | Ladies C2 |  |
| 2023 | C2 | 23:58:25 | | Murnaghan Liz & Metcalfe Vicky | Taunton & Pangbourne | 28 | | | | | Ladies,Ladies C2,Vet Ladies |  |
Mew Stephen | 29.1 | | | 111 | 1 | 0 | 0 | 0 | | |
| 2009 | FB | 29:09:30 | | Payne Mark & Mew Stephen | Artists Rifles | 111 | | | | | Tyne |  |
Mews Tobias | 25.6 | | | 82 | 1 | 0 | 0 | 0 | | |
| 2010 | | 25:39:10 | | Goss Jonathan & Mews Tobias | Independent | 82 | | | | | |  |
Meyer Russell | 18.6 | | | 8 | 1 | 0 | 0 | 0 | | |
| 2023 | | 18:39:41 | | Meyer Russell & Gilbert-Johns Jack | Southampton | 8 | | | | | |  |
Meynaar I | 22.4 | | | 26 | 1 | 0 | 0 | 0 | | |
| 1991 | C2 | 22:24:43 | | Feenstra H & Meynaar I | Alskv Levitas | 26 | | | | | |  |
Michaela D | 21.2 | | | 15 | 1 | 0 | 0 | 0 | | |
| 1991 | | 21:11:46 | | Firth N D & Michaela D | Royal Engineers | 15 | | | | | |  |
Michie J | 29.5 | | | 12 | 1 | 0 | 0 | 0 | | |
| 1960 | | 29:29:00 | | Richardson Jack & Michie J | Royal Marines | 12 | | | | | |  |
Michiels F | 34.7 | | | 41 | 2 | 0 | 0 | 0 | | |
| 1970 | | 34:45:30 | | Michiels F & Comblez V | Para-Commando Belgium | 34 | | | | | |  |
| 1971 | | 34:38:33 | | Regnier J P & Michiels F | Para-Commando Belgium | 48 | | | | | |  |
Mickleburgh J R | 34.7 | | | 51 | 1 | 0 | 0 | 0 | | |
| 1998 | | 34:45:47 | | Mickleburgh J R & Roberts C J | Independent | 51 | | | | | |  |
Micolson M M | 29.9 | | | 94 | 1 | 0 | 0 | 0 | | |
| 1992 | C2 | 29:55:20 | | Micolson M M & Neale G R | North Avon | 94 | | | | | |  |
Middlehurst Susan | 22.5 | | | 28 | 2 | 0 | 0 | 0 | | |
| 2011 | | 23:57:17 | | Middlehurst Susan & Pollock Andrew | Addlestone | 38 | | | | | |  |
| 2014 | | 21:09:53 | | Middlehurst Susan & Martin Beth | Richmond | 17 | | | | | Ladies |  |
Middlemast Lynda M | 36.3 | | | 116 | 1 | 0 | 0 | 0 | | |
| 1986 | | 36:19:01 | | Dalrymple D V & Middlemast Lynda M | Itchen Valley | 116 | | | | | |  |
Middleton Andrew | 27.1 | | | 55 | 1 | 0 | 0 | 0 | | |
| 2006 | | 27:06:55 | | Croft Peter & Middleton Andrew | Yorkies | 55 | | | | | |  |
Middleton C R | 18.6 | | | 3 | 2 | 1 | 0 | 0 | | |
| 1990 | | 18:58:05 | | Ellard S K & Middleton C R | Royal Leamington Spa | 4 | | | | | Lee |  |
| 1991 | | 18:20:19 | | Freeman R A & Middleton C R | Fladbury & Royal Leamington Spa | 1 | | 1 | | | Civilian,Lee |  |
Middleton Jeremy | 25.0 | | | 70 | 1 | 0 | 0 | 0 | | |
| 2009 | | 24:59:12 | | Middleton Jeremy & Baldwin Simon | Independent & Aberfan | 70 | | | | | |  |
Middleton P | 34.5 | | | 35 | 1 | 0 | 0 | 0 | | |
| 1961 | | 34:30:00 | | Meston J & Middleton P | Royal Marines Forces Volunteer Reserve | 35 | | | | | |  |
Middleton R P | 23.8 | | | 76 | 1 | 0 | 0 | 0 | | |
| 1987 | | 23:47:05 | | Booles K L & Middleton R P | Metropolitan Police AA | 76 | | | | | |  |
Middleton W | 29.9 | | | 55 | 1 | 0 | 0 | 0 | | |
| 1981 | | 29:53:57 | | Aldam I D & Middleton W | Newham | 55 | | | | | |  |
Midgeley R M | 50.8 | | | 108 | 1 | 0 | 0 | 0 | | |
| 1994 | | 50:49:45 | | Midgeley R M & Townsend Sarah Jane | Bristol & Independent | 108 | | | | | |  |
Midwood P | 22.0 | | | 27 | 1 | 0 | 0 | 0 | | |
| 1979 | | 22:01:06 | | Joy G S & Midwood P | I M Marsh College | 27 | | | | | |  |
Miemicki D | 26.1 | | | 72 | 1 | 0 | 0 | 0 | | |
| 1982 | | 26:05:39 | | Bassett A & Miemicki D | New York CRA/US CA | 72 | | | | | |  |
Miklos Renata | 20.4 | | | 10 | 3 | 0 | 0 | 0 | | |
| 2011 | | 20:59:34 | | Hall Kathryn & Miklos Renata | Wokingham | 12 | | | | | |  |
| 2012 | | 21:52:00 | | Hall Kathryn & Miklos Renata | Wokingham | 13 | | | | | |  |
| 2014 | | 18:24:53 | | Greenham Brian & Miklos Renata | Reading | 4 | | | | | Mixed |  |
Milbank Chris | 27.8 | | | 79 | 2 | 0 | 0 | 0 | | |
| 2011 | C2 | 29:34:35 | | Milbank Chris & Westwater Tom | Longridge | 93 | | | | | |  |
| 2012 | C2 | 26:00:58 | | Milbank Chris & Campbell Mark | Longridge | 64 | | | | | |  |
Milder C S | 32.6 | | | 119 | 1 | 0 | 0 | 0 | | |
| 1988 | | 32:37:45 | | Milder C S & Williams R S | RMA Sandhurst | 119 | | | | | |  |
Miles | 25.6 | | | 84 | 1 | 0 | 0 | 0 | | |
| 1990 | | 25:36:03 | | Miles & Thorn J | Falcon | 84 | | | | | |  |
Miles J | 23.6 | | | 55 | 2 | 0 | 0 | 0 | | |