Progress against the field
Between Dublin 2025 and Manchester 2026, Jessica Mason pulled 1:18 ahead of the field.
The races barely moved for everyone else, so 1:46 faster on the clock is close to the whole story.
The biggest step was London Excel 2025 → Manchester 2026: 6:42 on the field in 48 days.
How this is worked out ⓘ
A finish time moves for two reasons: the athlete, and the race — its course, its floor, its day. For each pair of races in a row in one category, we take everyone who raced both and use the middle of how much they moved (the median) as "the race". Whatever is left is the athlete. Doubles are compared only when the same two people raced both, and told as the pair's; relays are left out. A pair with fewer than 15 athletes in common is not shown.
Every race
3 races · 3 events
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Manchester21 Jan 2026Individual Open · Women1:48:16 PB632/825Beat 23%
↑ 48 days after London Excel 2025 6:42 better than the field Why ↓Close ↑
6:16 faster on the clock in a race that was 0:26 slower for everyone: 6:42 better than the field.
The fieldCompare these two →0:26 slower This athlete6:16 faster -
London Excel4 Dec 2025Individual Open · Women1:54:321391/1542Beat 10%
↑ 22 days after Dublin 2025 5:24 worse than the field Why ↓Close ↑
4:30 slower on the clock in a race that was 0:54 faster for everyone: 5:24 lost to the field.
The fieldCompare these two →0:54 faster This athlete4:30 slower -
Dublin12 Nov 2025Individual Open · Women1:50:02483/539Beat 10%