Progress against the field
From Birmingham 2025 to Cardiff 2026, Harley Kozluk and Darren Williams have moved with the field: what changed on the clock changed for everyone.
Over the same races everyone got 2:09 quicker, so 2:23 faster on the clock looks better than it was.
The biggest step was Birmingham 2025 → London Excel 2025: 7:22 on the field 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
3 races · 3 events
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Cardiff29 Apr 2026Doubles Open · Men1:18:53215/271Beat 21%
↑ 146 days after London Excel 2025, with Darren Williams 7:08 worse than the field Why ↓Close ↑
6:50 slower on the clock in a race that was 0:18 faster for everyone: 7:08 lost to the field.
The fieldCompare these two →0:18 faster This pair6:50 slower -
London Excel4 Dec 2025Doubles Open · Men1:12:03 PB950/1815Beat 48%
↑ 43 days after Birmingham 2025, with Darren Williams 7:22 better than the field Why ↓Close ↑
7:22 better than the field: 9:13 faster on the clock, against 1:51 faster for everyone.
The fieldCompare these two →1:51 faster This pair9:13 faster -
Birmingham22 Oct 2025Doubles Open · Men1:21:16865/1099Beat 21%