George Mills running in the 1500m at the London Diamond
League, in which he fell. However, on 12th June 2025, he set a
new British record for the 5,000 metres, running 12:46.59
in the Diamond League at the Bislett Games in Oslo.
On 16 September 2023 at the Eugene Diamond League meeting,
with a third place finish, Mills moved to third place on the British all-time
list for the mile behind Steve Cram and Sebastian Coe with a time
of 3:47.65.