Olympic bronze medallist Joanne Jackson clocked her quickest time for two years to clinch the 200m Freestyle title at the British Gas ASA National Championships in Sheffield.
British Gas ITC Loughborough's Jackson looked relaxed as she qualified fastest from the morning heats before dominating the final to touch home in 1:58.32.
And after ducking under the qualification time for this summer's World Championships in Shanghai, the British record holder admitted she was looking ahead with confidence.
"That's a great swim which puts me on the team for Shanghai," Jackson said. "This time last year I didn't think it would happen as I was struggling with health and form so to overturn that with a best time in two years is a great achievement.
"There were some fantastic performances in that final. It was great to see Caitlin and Rebecca pushing hard. It looks great for the relay."
The silver medal went to Caitlin McClatchey (Loughborough University) in 1:58.56 and Rebecca Turner (City of Sheffield) won the bronze in 1:58.66.
The 100m Backstroke saw Lizzie Simmonds (British Gas ITC Loughborough) fighting for the final qualification spot for Shanghai.
Simmonds, who just missed the selection time in Manchester, went into the final with confidence after qualifying in first and led through the first 50m.
She turned almost a second ahead of the field and maintained her pace to win gold in an season's best 59.86.
"I'm not quite as big as some of the other girls in the field so I spend a lot of time on my skills to make sure I can keep up with their power," said Simmonds.
"I think I showed tonight that it's serving me well. That's a great time and puts me on to the World Championship team.
"I didn't have a good start to the season but I've turned it around. I'm enjoying my swimming and it's translating into my performance."
Ealing's Ekaterina Avramova won the silver medal in 1:01.53 and bronze was taken by Rachel Lefley (Loughborough University) in 1:01.67.
The closest final of the evening was the 100m Butterfly which saw British record holder Fran Halsall and Welsh record holder Jemma Lowe battle for gold.
Halsall led from the gun and touched first at the half-way turn but Lowe stormed back in the second 50m to take the victory on the touch in a new Welsh record of 57.43.
"It's been a really good day for me all round," Lowe said. "My Mum and Dad just turned up to see me swim after rushing from my sister's X Factor audition where she got through to the next round. That was a big PB and a Welsh record.
"The last time I showed this kind of form was three years ago. I've been trying to step it up ever since I return to the UK and tonight's swim was just fantastic. Ellen, Fran and me just show what depth of
talent we have in the country these days. And in such strong competition I am delighted to have made the team."
Halsall touched just 0.01 seconds outside of Lowe in 57.44 to take silver. Bronze went to Jessica Sylvester in 1:00.61
Siobhan Marie O'Connor (British Gas ITC Bath) won gold ahead of City of Sheffield's Lucy Spencer in the women's 200m Individual Medley.
The 15-year old led throughout the race after qualifying third fastest for the final. She touched in a time of 2:14.14 to win her title.
"I haven't rested for this meet so I'm stunned to have swam so fast," O'Connor said. "The aim was to swim well, not to make the World Championships team.
"I'm amazed to make the senior qualifying time. I'm due to swim in the European Juniors next month but will sit down with my coach now to discuss what will be the main focus this year. I'm just so shocked."
Spencer won the silver in 2:14.36 and Sophie Allen (British Gas ITC Stockport) won the bronze in 2:14.45.
Anastasia Christoforou (Bath University) won the gold medal in the women's 50m Breaststroke with a quick 32.04.
She finished ahead of Kathryn Johnstone (Edinburgh University) who finished in 32.27 and Ealing's Georgia Heyn in 32.30.
