World Athletics confirmed Josh Kerr’s mile world record on Monday. His 3:42.66 at the London Diamond League on July 18 is now official. Kerr’s time beat El Guerrouj’s 1999 record by 0.47 seconds.

Kerr’s record was ratified alongside three others. These include Kejelcha’s half-marathon and two hurdles records. His wait for confirmation was between two major road records this year. Read more racing coverage.

Kerr’s pacers brought him through key checkpoints faster than El Guerrouj’s 1999 race. Kerr was ahead at every checkpoint. Only Ingebrigtsen had come close to El Guerrouj’s record in 27 years. Related: Josh Kerr's Mile Record Ratified by World Athletics.

This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.