Adam Peaty powered to his second gold of the World Championships in Budapest with the second quickest time in history in the 50 metres breaststroke.
After setting two world records on Tuesday's third day when qualifying 0.73 seconds clear of the field, Peaty was expected to touch first by some margin at the Duna Arena on the banks of the Danube.
And the 22-year-old Uttoxeter swimmer did not disappoint, clocking 25.99 seconds, just 0.04secs down on his own world record. His victory margin was 0.53secs.
Silver went to Joao Gomes of Brazil in 26.52 and bronze to Cameron van der Burgh of South Africa in 26.60.
Peaty's world record coming into the championships was 26.42, set in winning gold in Kazan, Russia two years ago.
His heat swim on Tuesday lowered the mark to 26.10 and he knocked a further 0.15 off it in Tuesday evening's semi-final to take it to 25.95.
Peaty won 100m gold on Monday with the second quickest time ever -- behind only his Olympic gold medal-winning swim -- and now has replicated his individual haul from the 2015 World Championships. Further medal success could follow in the relays.
Peaty now is a five-time world champion. He has two more victories than the next best Briton, David Wilkie, another breaststroke swimmer who won his world titles in 1973 and 1975.
Great Britain now have three gold medals from the 17th World Championships, after Ben Proud's 50m butterfly success on Monday.
Peaty immediately turned his attentions to the 4x100m mixed medley relay, the final of which was scheduled to start an hour after his individual event.
Earlier, Duncan Scott advanced to the 100m freestyle final, qualifying in sixth place.
Scott clocked 48.10 in the first semi-final won by fastest qualifier Mehdy Metella of France in 47.65.
Georgia Davies won her 50m backstroke semi-final in 27.49, qualifying fourth quickest for Thursday's final.
Brazil's Etiene Medeiros led the way in 27.18.