| J M Jefferson (GB) (Trainer) last month / 50 races (Form details from all UK, Irish and South African thoroughbred races) | ||||||||||
| Race date, time | Course | Horse | Distance | Class | Fin pos | Jockey | SP | Prize money | Winner | |
| Track summary (since 2008) | ||||
| Track | Starts | Wins | 2nds | 3rds |
| Aintree | 55 | 5 (9%) | 9 | 2 |
| Ascot | 1 | - | - | - |
| Ayr | 93 | 11 (12%) | 16 | 10 |
| Bangor | 42 | 2 (5%) | 2 | 7 |
| Beverley | 2 | - | - | - |
| Carlisle | 116 | 17 (15%) | 17 | 22 |
| Cartmel | 12 | 2 (17%) | 3 | 1 |
| Catterick | 107 | 9 (8%) | 14 | 11 |
| Cheltenham | 61 | 3 (5%) | 4 | 6 |
| Doncaster | 123 | 11 (9%) | 18 | 12 |
| Exeter | 1 | - | - | - |
| Fakenham | 11 | 2 (18%) | 1 | 2 |
| Hamilton | 2 | - | - | - |
| Haydock | 105 | 12 (11%) | 10 | 11 |
| Hexham | 124 | 22 (18%) | 19 | 19 |
| Huntingdon | 21 | 2 (10%) | 1 | 2 |
| Kelso | 125 | 21 (17%) | 20 | 19 |
| Kempton | 4 | 1 (25%) | - | - |
| Leicester | 7 | - | - | - |
| Lingfield | 1 | - | - | - |
| Ludlow | 3 | - | - | 1 |
| Market rasen | 234 | 37 (16%) | 35 | 22 |
| Musselburgh | 33 | 5 (15%) | 3 | 6 |
| Newbury | 8 | - | - | 1 |
| Newcastle | 151 | 24 (16%) | 21 | 14 |
| Nottingham | 4 | 1 (25%) | - | - |
| Perth | 75 | 13 (17%) | 10 | 9 |
| Pontefract | 5 | - | - | - |
| Punchestown | 1 | - | - | - |
| Redcar | 4 | 1 (25%) | - | 1 |
| Ripon | 3 | - | - | 1 |
| Sandown | 11 | - | 1 | 1 |
| Sedgefield | 211 | 42 (20%) | 29 | 25 |
| Southwell | 95 | 8 (8%) | 15 | 19 |
| Stratford | 24 | 1 (4%) | 2 | 1 |
| Thirsk | 4 | - | 1 | - |
| Towcester | 23 | - | 3 | 3 |
| Uttoxeter | 68 | 7 (10%) | 10 | 2 |
| Warwick | 7 | 1 (14%) | 2 | - |
| Wetherby | 177 | 21 (12%) | 22 | 15 |
| Wolverhampton | 14 | 1 (7%) | - | 1 |
| Worcester | 4 | - | - | 1 |
| York | 7 | - | 1 | - |
| Total | 2179 | 282 | 289 | 247 |
| Going summary (since 2008) | ||||
| Going | Starts | Wins | 2nds | 3rds |
| Good | 777 | 92 (12%) | 106 | 92 |
| Good to firm | 155 | 15 (10%) | 20 | 13 |
| Good to soft | 508 | 71 (14%) | 67 | 55 |
| Heavy | 169 | 35 (21%) | 24 | 25 |
| Soft | 447 | 66 (15%) | 71 | 57 |
| Standard | 30 | 3 (10%) | 1 | 5 |
| Standard / slow | 2 | - | - | - |
| Unknown | 91 | - | - | - |
| Total | 2179 | 282 | 289 | 247 |
| Year summary | ||||
| Year | Starts | Wins | 2nds | 3rds |
| 2008 | 196 | 27 (14%) | 26 | 30 |
| 2009 | 232 | 15 (6%) | 29 | 13 |
| 2010 | 293 | 23 (8%) | 30 | 30 |
| 2011 | 228 | 27 (12%) | 22 | 21 |
| 2012 | 206 | 30 (15%) | 22 | 25 |
| 2013 | 209 | 25 (12%) | 26 | 24 |
| 2014 | 219 | 27 (12%) | 29 | 28 |
| 2015 | 184 | 35 (19%) | 27 | 28 |
| 2016 | 191 | 45 (24%) | 40 | 24 |
| 2017 | 202 | 25 (12%) | 35 | 24 |
| 2018 | 19 | 3 (16%) | 3 | - |
| Total | 2179 | 282 | 289 | 247 |