Olympic omnium champion Laura Trott underlined her all-round quality in the six-race event with a sparkling performance at the season-opening Track World Cup to put herself in pole position for gold at the Manchester velodrome.
Trott started the day with a superb individual pursuit ride of 3:34.293minutes, faster than compatriot and Saturday's individual pursuit winner and national time-trial champion Joanna Rowsell, to top the standings having been sixth overnight.
The world record-breaking speedster, who had teamed up with Rowsell in Friday's team pursuit to twice break their own world best, then pulverised the field in the 40-lap scratch race.
The 21-year-old stormed off in the penultimate event to whoops of delight from the home crowd and caught her competitors just over ten laps into the race, before swooping around the outside on the final stretch to take the overall lead with the 500-metre time-trial to come later.
Trott heads the standings on 18 points, with Canadian Gillian Carleton on 21 and Jolien D'Hoore of Belgium in third also on 21.
She saluted the crowd and even high-fived a few lucky front-row spectators as she celebrated her superb scratch race tactics.
Olympic sprint champion Jason Kenny had less to cheer about when he exited at the qualifying stage, though compatriot Matt Crampton made the semi-finals and will take on Trinidad's Njisane Nicholas Phillip in the last four.
Kenny finished 24th out of 41 riders to miss the top 16 and round off a disappointing weekend, after the world keirin champion could only muster fourth in cycling's fastest event.
World keirin champion Becky James has a chance to make up for the disappointment of sprint bronze when she goes in the first of two second-round heats against Australian powerhouse Anna Meares and Hong Kong's Wai Sze Lee, the top three qualifying for the final.
Owain Doull in the men's scratch race final and Elinor Barker in the women's points race will also have a chance to bring down the curtain on another successful weekend for British track cycling.
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