| 257 runs | Surrey v Gloucestershire | The Brit Oval, Kennington | a18204 |
| 185 runs | Gloucestershire v Ireland | Castle Avenue, Dublin | a18220 |
| 143 runs | Durham v Worcestershire | Riverside Ground, Chester-le-Street | a18245 |
| 137 runs | Hampshire v Glamorgan | St Helen's, Swansea | a18246 |
| 135 runs | Essex v Hampshire | The Ford County Ground, Chelmsford | a18197 |
| 132 runs | Essex v Sussex | Arundel Castle Cricket Club Ground, Arundel | a18265 |
| 128 runs | Somerset v Ireland | County Ground, Taunton | a18210 |
| 125 runs | Durham v Hampshire | Lord's Cricket Ground, St John's Wood | a18331 |
| 122 runs | Worcestershire v Lancashire | Old Trafford, Manchester | a18187 |
| 122 runs | Nottinghamshire v Northamptonshire | County Ground, Northampton | a18201 |
| 112 runs | Kent v Sussex | County Ground, Hove | a18251 |
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