Kerr ran 3:42.66 in London, the first man under 3:43, breaking El Guerrouj's 27-year-old record of 3:43.13.
The record market resolves YES only if World Athletics ratifies (or provisionally confirms on the night, pending standard checks) a time below 3:43.13 by Kerr in the London Athletics Meet mile on 18 July 2026; official timing per World Athletics and Diamond League results. If the mile is removed from the programme or Kerr withdraws before the gun, both live markets void.
No one has beaten the mile record since Rome in 1999. The men's mile world record fell again and again in the years of Sebastian Coe, Steve Ovett and Steve Cram, then stopped moving. Every generation since has tried, including planned attempts with pacers and new kit by the best 1500m runners of their time.