Thirsk White Horse swimmer Alexander Fish took two gold medals and two fourth places at City of York's swim meet, which opened the new year's competitions.
He took gold in the freestyle and breaststroke events and fourth in the backstroke and butterfly events, all in improved times.
Thirsk were represented by seven swimmers, producing 21 personal best times between them.
Ten-year-old Sarah Dowson, competing for the first time in this type of event, produced four great swims.
In the backstroke she wiped over seven seconds off her previous best time and six seconds off her freestyle swim, while in the breaststroke and butterfly events she improved both swims by over one and a half seconds.
Thea Wilson, 11, had three good swims which produced one gold and a sixth place and three best ever times.
The gold came in the freestyle, and the sixth in the backstroke, with the other best time coming in the butterfly.
Richard Walkland was also among the medals, taking silver in the breaststroke and fifth place in the freestyle.
Club-mates Jenna Wilson and Melanie Dowson had a private tussle in two of the events they entered, with Jenna beating Melanie by just one hundredth of a second in the freestyle to take seventh place.
In the breastsroke, Melanie turned the tables to take seventh place from Jenna by only two hundredths of a second. Melanie also finished fourth in the backstroke and sixth in the butterfly.
Thirsk's seventh swimmer, ten-year-old Charlotte Chambers, also had three excellent swims, producing three best ever times in the backstroke, breaststroke and freestyle events.
Next weekend the club is competing at Huddersfield and Nottingham.
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