| Jack Finch | Down Royal 3.30 | Sat |
| Jack Luey | Southwell 2.20 | Thu |
| Jack My Boy | Doncaster 1.35 | Sat |
| Jack My Boy | Doncaster 1.35 | Sat |
| Jackie Boy | Hereford 1.30 | Sun |
| Jackie Boy | Warwick 3.20 | Wed |
| Jackie Kiely | Southwell 3.20 | Thu |
| Jake Spoon | Newcastle 3.45 | Fri |
| James Pollard | Ludlow 1.30 | Thu |
| January | Dundalk 8.30 | Sat |
| Jaques Vert | Warwick 3.50 | Wed |
| Jardin De Vienne | Sandown 12.30 | Sat |
| Jaroslaw | Doncaster 2.40 | Sat |
| Jarrow | Doncaster 12.25 | Sat |
| Jarrow | Doncaster 1.00 | Sat |
| Jau | Hereford 3.05 | Sun |
| Jau | Hereford 3.05 | Sun |
| Jau | Hereford 3.35 | Sun |
| Jau | Exeter 3.40 | Tue |
| Jau | Warwick 1.50 | Wed |
| Jenny Soba | Doncaster 2.05 | Sat |
| Jenny Soba | Doncaster 2.05 | Sat |
| Jetlag | Hereford 2.00 | Sun |
| Jetlag | Hereford 2.00 | Sun |
| Jewelled | Doncaster 12.25 | Sat |
| Jewelled | Kempton 8.20 | Wed |
| Jewelled | Wolverhampton 4.20 | Thu |
| Jigalo | Navan 3.00 | Sun |
| Jigsaw Dancer | Sandown 2.10 | Sat |
| Jilly Why | Wolverhampton 6.50 | Fri |
| Jim Tango | Kelso 12.50 | Sat |
| Jim Tango | Market Rasen 2.25 | Sun |
| Jim Tango | Taunton 1.10 | Thu |
| Jiminor Mack | Southwell 3.20 | Thu |
| Jobekani | Wolverhampton 8.20 | Fri |
| Jocheski | Taunton 1.10 | Thu |
| Jocheski | Taunton 3.10 | Thu |
| Joe Leforze | Carlisle 12.50 | Mon |
| Joe Lively | Down Royal 2.30 | Sat |
| Joe Twist | Southwell 2.15 | Mon |
| Joe's A Boy | Carlisle 3.30 | Mon |
| John Fenton | Southwell 2.15 | Mon |
| John's Gift | Wincanton 4.00 | Sat |
| Johnny Mullen | Wincanton 4.00 | Sat |
| Join In The Dance | Santa Anita 8.10 | Sat |
| Join Up | Wolverhampton 8.20 | Fri |
| Jojesse | Southwell 12.50 | Thu |
| Jojesse | Southwell 1.20 | Thu |
| Jojesse | Wolverhampton 8.20 | Fri |
| Joking Aside | Exeter 1.10 | Tue |
| Joking Aside | Lingfield 1.00 | Tue |
| Jordaura | Doncaster 11.55 | Sat |
| Jordaura | Doncaster 12.25 | Sat |
| Josephine Malines | Kelso 12.50 | Sat |
| Josephine Malines | Kelso 12.50 | Sat |
| Josephine Malines | Carlisle 12.50 | Mon |
| Josephine Malines | Carlisle 4.00 | Mon |
| Josephine Malines | Southwell 3.20 | Mon |
| Josephine Malines | Bangor 3.10 | Wed |
| Josephine Malines | Newcastle 12.25 | Fri |
| Journeyman | Ffos Las 4.20 | Sun |
| Journeyman | Warwick 3.50 | Wed |
| Judge Roy Bean | Navan 1.25 | Sun |
| Jug Of Punch | Hereford 1.00 | Sun |
| Jug Of Punch | Cheltenham 3.35 | Fri |
| Juicy Pear | Kempton 7.50 | Wed |
| Jumby Bay | Sedgefield 1.20 | Tue |
| Just Beware | Lingfield 3.30 | Tue |
| Just Blue | Ffos Las 4.20 | Sun |
| Just Blue | Warwick 3.50 | Wed |
| Just Bond | Wolverhampton 6.20 | Thu |
| Just Bond | Wolverhampton 8.50 | Fri |
| Just For Jean | Sedgefield 3.50 | Tue |
| Just Maddie | Kelso 12.15 | Sat |
| Just Maddie | Kelso 12.15 | Sat |
| Just Matty | Southwell 3.20 | Mon |
| Just One Thing | Lingfield 4.00 | Tue |
| Just One Thing | Ludlow 4.00 | Thu |
| Just One Thing | Taunton 4.10 | Thu |
| Just Playfull | Lingfield 1.30 | Tue |
| Just Playfull | Warwick 3.20 | Wed |
| Just Smudge | Sandown 3.20 | Sat |
| Just Smudge | Bangor 2.10 | Wed |
| Just Victor | Warwick 12.50 | Wed |
| Just Victor | Ludlow 1.00 | Thu |
| Just Victor | Taunton 3.10 | Thu |
| Justcallmehandsome | Wolverhampton 4.40 | Mon |
| Justenuffhumor | Santa Anita 9.28 | Sat |
| Justtheoneforyou | Carlisle 1.20 | Mon |
| Justtheoneforyou | Newcastle 3.10 | Fri |
| Justwhateverulike | Kelso 1.25 | Sat |
| Justwhateverulike | Kelso 1.25 | Sat |
| Justwhateverulike | Kelso 3.00 | Sat |