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Tom Bosworth set a new world record at the Anniversary Games on Saturday.
The Tonbridge AC athlete clocked 10min43.84sec to win the 3,000m walk in London.
Going through halfway in 5.22, the Commonwealth 20km silver medallist was on track to make history and Bosworth kept his composure to cross the finish line in record time, despite the close attentions of South Africa's Lebogang Shange.
Bosworth said: "It was a shock to do that. I've just come back from altitude training but I still wanted to see what I could do and this is all heading in the right direction for the Europeans.
"Coming to the London Stadium changes everything for me. Usually I'm on the road and race walking isn't included in the Diamond League very often.
"I thought there was going to be trouble if I got beaten but I knew the crowd would push me home in that world-class field. He (Shange) was fourth in London last year and I knew it was going to take a PB to win. I use the shorter races to prepare for the 20km races."
It was the 28-year-old's first race in London since being disqualified from the World Championship 20km race walk last summer and a second successive record at the Anniversary Games.
Last year Bosworth smashed the one-mile record in 5.31.08.