Tuesday 25 July 2017 18:11, UK
Adam Peaty has become the first man to break 26 seconds for the 50 metres breaststroke.
The 22-year-old clocked 25.95 during his semi-final heat at the World Swimming Championships in Budapest.
Peaty's time broke his own world record, set earlier on Tuesday, in a first round heat when he swam 26.10.
The Uttoxeter-born swimmer had set the previous world record as well (26.42), two years ago at the World Championships which were staged in Russia.
Peaty has now broken the 50m world record four times, the first of these in 2014.
In Tuesday afternoon's race, he finished 0.90s ahead of Russian Kirill Prigoda, although South African Cameron van der Burgh is expected to be his biggest rival in Wednesday's final.
Peaty also holds the 100m breaststroke world record, set during last year's Olympic final in Rio.
On Monday, he claimed gold in the 100m world final, although his winning time of 57.47 was 0.34s outside the record.
