| 294 runs | Somerset v Leicestershire | County Ground, Taunton | f10235 |
| 283 runs | Derbyshire v Glamorgan | St Helen's, Swansea | f10230 |
| 251 runs | Yorkshire v Derbyshire | County Ground, Derby | f10166 |
| 228 runs | Leicestershire v Glamorgan | Aylestone Road, Leicester | f10356 |
| 226 runs | Leicestershire v Derbyshire | The Town Ground, Burton-on-Trent | f10238 |
| 223 runs | Warwickshire v Worcestershire | War Memorial Ground, Amblecote | f10227 |
| 221 runs | Surrey v Somerset | Recreation Ground, Bath | f10186 |
| 201 runs | Sussex v Glamorgan | County Ground, Hove | f10242 |