Progress against the field
Joanna Jeffs has dropped 12:22 behind the field from London Excel 2025 to Birmingham 2026.
The clock says 9:42 slower, but the races themselves got 2:40 quicker for everyone.
221 days between London Olympia 2026 and Birmingham 2026 is the longest gap compared here, and the second race was 15:47 behind the field.
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
4 races · 4 events
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Birmingham31 Oct 2026Individual Open · Women1:53:53461/552Beat 17%
↑ 221 days after London Olympia 2026 15:47 worse than the field Why ↓Close ↑
14:31 slower on the clock in a race that was 1:16 faster for everyone: 15:47 lost to the field.
The fieldCompare these two →1:16 faster This athlete14:31 slower -
London Olympia24 Mar 2026Individual Open · Women1:39:22 PB317/493Beat 36%
↑ 110 days after London Excel 2025 3:25 better than the field Why ↓Close ↑
4:49 faster on the clock, and the race was 1:24 faster for everyone, so 3:25 of it was this athlete.
The fieldCompare these two →1:24 faster This athlete4:49 faster -
London Excel4 Dec 2025Individual Open · Women1:44:111245/1542Beat 19%
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Manchester9 Nov 2024Doubles Open · Women1:28:06 PB324/486Beat 33%