| Rank | Date | Venue | Athlete | Time |
| 1 | 2008 | Reading | Louise Perrio | 80:13 |
| 2 | 1995 | Portsmouth | Jannette Shepherd | 80:52 |
| 3 | 5 April 2010 | Guernsey (Easter) | Martine Scholes | 82:10 |
| 4 | 20 June 2010 | Guernsey (June Half) | Bronwyn McNeill-Rogers | 82:18 |
| 5 | June 1995 | Guernsey (June Half) | Penny Buckingham | 83:53 |