| 163 runs | Essex v Glamorgan | County Ground, Chelmsford | a16124 |
| 145 runs | Leicestershire v Yorkshire | Headingley, Leeds | a15850 |
| 145 runs | Yorkshire v Somerset | County Ground, Taunton | a15884 |
| 132 runs | Sussex v Middlesex | County Ground, Hove | a16115 |
| 127 runs | Middlesex v Scotland | Old Deer Park, Richmond | a15976 |
| 124 runs | Worcestershire v Leicestershire | Doncaster Close, Oakham School | a15928 |
| 114 runs | Somerset v Derbyshire | County Ground, Derby | a15898 |
| 114 runs | Sussex v Scotland | Raeburn Place, Edinburgh | a16050 |
| 112 runs | Warwickshire v Lancashire | Edgbaston, Birmingham | a15937 |
| 111 runs | Worcestershire v Derbyshire | County Ground, New Road, Worcester | a16030 |
| 109 runs | Somerset v Derbyshire | County Ground, Taunton | a15847 |
| 109 runs | Northamptonshire v Gloucestershire | Archdeacon Meadow, Gloucester | a15933 |
| 104 runs | Nottinghamshire v Yorkshire | Trent Bridge, Nottingham | a15859 |
| 102 runs | Gloucestershire v Lancashire | College Ground, Cheltenham | a16013 |