Progress against the field
Between Birmingham 2025 and Birmingham 2026, Natasha Lock pulled 21:28 ahead of the field.
The clock says 25:42 faster, but the races themselves got 4:14 quicker for everyone.
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 · Women1:48:21 PB422/547Beat 23%
↑ 374 days after Birmingham 2025 21:28 better than the field Why ↓Close ↑
21:28 better than the field: 25:42 faster on the clock, against 4:14 faster for everyone.
The fieldCompare these two →4:14 faster This athlete25:42 faster -
Manchester21 Jan 2026Doubles Open · Mixed1:42:30 PB778/824Beat 6%
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London Excel4 Dec 2025Doubles Open · Women1:41:18 PB1697/1887Beat 10%
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Birmingham22 Oct 2025Individual Open · Women2:14:03712/748Beat 5%