Progress against the field
Between Manchester 2025 and Cardiff 2026, Lauren Costello lost 10:55 to the field.
Over the same races everyone got 11:59 quicker, so 1:04 faster on the clock looks better than it was.
The largest gain on the field came from Birmingham 2025 → London Excel 2025: 5:06 in 43 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
6 races · 6 events
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Cardiff29 Apr 2026Individual Open · Women1:30:15114/253Beat 55%
↑ 98 days after Manchester 2026 3:05 better than the field Why ↓Close ↑
3:05 better than the field: 6:36 faster on the clock, against 3:31 faster for everyone.
The fieldCompare these two →3:31 faster This athlete6:36 faster -
Manchester21 Jan 2026Individual Open · Women1:36:51149/263Beat 43%
↑ 48 days after London Excel 2025 9:37 worse than the field Why ↓Close ↑
9:37 behind the field: 10:03 slower on the clock, against 0:26 slower for everyone.
The fieldCompare these two →0:26 slower This athlete10:03 slower -
London Excel4 Dec 2025Individual Open · Women1:26:48 PB638/1542Beat 59%
↑ 43 days after Birmingham 2025 5:06 better than the field Why ↓Close ↑
5:06 better than the field: 8:10 faster on the clock, against 3:04 faster for everyone.
The fieldCompare these two →3:04 faster This athlete8:10 faster -
Birmingham22 Oct 2025Individual Open · Women1:34:58465/829Beat 44%
↑ 172 days after London 2025 1:19 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:19 faster on the clock looks better than it was: the race was 1:38 faster for everyone, which leaves this 1:19 behind the field.
The fieldCompare these two →1:38 faster This athlete0:19 faster -
London3 May 2025Individual Open · Women1:35:17812/1368Beat 41%
↑ 99 days after Manchester 2025 8:10 worse than the field Why ↓Close ↑
8:10 behind the field: 3:58 slower on the clock, against 4:12 faster for everyone.
The fieldCompare these two →4:12 faster This athlete3:58 slower -
Manchester24 Jan 2025Individual Open · Women1:31:19252/539Beat 53%