Rebecca Adlington produced a dominant display to win the 800m freestyle and with it her third title at the British Championships in Manchester.
Double Olympic champion Adlington, 22, destroyed a strong field in eight minutes 20.23 seconds.
Jazmin Carlin produced a personal best 8:25.67 seconds to finish second, with Keri-Anne Payne in third.
"It was a hard race but I expected it to be closer because we have such strong girls," said Adlington.
She has now claimed three titles this week following her victories in the 200m and 400m freestyle but, despite shaving almost 16 seconds off her semi-final time, Adlington remains cautious over her chances at the forthcoming World Championships.
"I am looking forward to Shanghai," she said. "World Championships are not usually my thing, so I am hoping it can be third time lucky."
In the evening's other races, Stephanie Proud produced the biggest upset by clinching first place in the 200m backstroke ahead of European champion Elizabeth Simmonds and Gemma Spofforth, who finished in a disappointing fifth place.
Junior champion Karley Mann was impressive as she finished just under a second behind Simmonds, but both failed to make the World Championships qualifying time.
Proud, who has now qualified for Shanghai, recorded a time of 2:09.41, which was over two seconds quicker than Simmonds.
"After so many times just missing out, I'm so happy," said a delighted Proud moments after her victory. "A lot of people say I get intimidated swimming against the best but I really don't and I think I have proved that now."
In the men's 50m freestyle, Adam Brown sealed his place in the team for Shanghai with an impressive time of 22.29 ahead of Owen Morgan, whose time of 22.67 is a new Welsh record.
"That was the aim, to get that time tonight," said Brown. "But I had to shave my beard off so I'm glad I could qualify."
Simon Burnett was expected to push Brown all the way given his strong form of late, but the Windsor swimmer was edged out by Morgan.
There were also wins in Manchester for Jessica Sylvester in the 50m butterfly final and Michael Rock, who saw off the challenge of Antony James, in the 100m butterfly final.
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