| US Ranger | Goodwood 3.30 | Wed |
| Ubenkor | Redcar 5.40 | Wed |
| Ugly Betty | Carlisle 5.20 | Sun |
| Ugly Betty | Carlisle 5.20 | Sun |
| Uhuru Peak | Yarmouth 5.00 | Mon |
| Ultimate Quest | Nottingham 3.20 | Thu |
| Umpa Loompa | Leicester 8.45 | Wed |
| Unbiased | Windsor 8.15 | Mon |
| Unbiased | Nottingham 4.30 | Thu |
| Uncle Bulgaria | Southwell 3.15 | Mon |
| Uncle Bulgaria | Southwell 4.45 | Mon |
| Uncle Harry | Thirsk 2.00 | Fri |
| Uncle Harry | Thirsk 2.00 | Fri |
| Uncle Harry | Pontefract 5.00 | Sun |
| Under Fire | Chepstow 6.20 | Fri |
| Under Fire | Chepstow 6.20 | Fri |
| Under Fire | Windsor 8.45 | Mon |
| Under The Table | Wolverhampton 4.10 | Fri |
| Under The Table | Southwell 2.15 | Mon |
| Underworld | Ascot 3.05 | Sat |
| Underworld | Ascot 3.40 | Sat |
| Underworld | Ascot 3.40 | Sat |
| Underworld | Goodwood 5.50 | Wed |
| Underworld | Goodwood 4.40 | Thu |
| Union Deux | Worcester 8.20 | Tue |
| United Nations | Redcar 4.30 | Wed |
| United Nations | Nottingham 5.05 | Thu |
| Until When | Thirsk 5.30 | Fri |
| Until When | Thirsk 5.30 | Fri |
| Until When | Pontefract 5.30 | Sun |
| Upton Grey | Goodwood 4.05 | Thu |
| Urban Warrior | Salisbury 8.10 | Sat |
| Ursus | Redcar 5.40 | Wed |