New Games record for Peaty
England's Adam Peaty followed up his gold medal in the 100 metres breaststroke with a Commonwealth Games record in the 50m event.
The 19-year-old swam 27 seconds flat to beat world-record holder Cameron van der Burgh by 0.39secs.
Scotland's 200m gold medallist Ross Murdoch won his heat ahead of Australian Christian Sprenger in 27.44.
Fellow Scots Mark Tully and Joe Welstead were also in the top seven while Welshman Rob Holderness, England's James Wilby and Michael Dawson of Northern Ireland all made tonight's semi-finals.
Earlier, English pair Lizzie Simmonds and Lauren Quigley both qualified for the 200m backstroke final.
Simmonds, who came fifth in the 100m final, was the second-fastest qualifier behind Canada's Hilary Caldwell, who swam 2:09.47, while British champion Quigley was four seconds slower as she grabbed the final place in a race that will include three Australians and three Canadians.