Narrowest Margin of Runs Defeat
| 2 runs | by Essex | County Ground, Chelmsford | 2003 | tt37 |
| 4 runs | by Gloucestershire | County Ground, Bristol | 2010 | tt1806 |
| 6 runs | by Hampshire | Old Deer Park, Richmond | 2008 | tt963 |
| 6 runs | by Essex | Lord's Cricket Ground, St John's Wood | 2012 | tt2987 |
| 8 runs | by Essex | The Ford County Ground, Chelmsford | 2011 | tt2304 |
| 9 runs | by Kent | St Lawrence Ground, Canterbury | 2011 | tt2252 |
| 9 runs | by Surrey | Lord's Cricket Ground, St John's Wood | 2011 | tt2319 |
| 11 runs | by Sussex | Lord's Cricket Ground, St John's Wood | 2012 | tt2974 |
| 12 runs | by England | Stanford Cricket Ground, Coolidge | 2008/09 | tt1041 |
| 17 runs | by Kent | Lord's Cricket Ground, St John's Wood | 2006 | tt383 |
| 19 runs | by Leicestershire | Grace Road, Leicester | 2005 | tt236 |
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