Scot Hannah Miley and double Olympic champion Rebecca Adlington both produced impressive efforts in the run-up to the world championships on the opening day of the British Gas Scottish National Open Championships at Tollcross Leisure Centre in Glasgow. 

Miley, who has already qualified for the world in Rome next month, confirmed her domination of the 400m medley. The 19-year-old European record-holder, who is coached by her father at the Garioch Pool in Inverurie, cruised to victory in 4:39.35. 

Adlington, Olympic champion in both the 400m and 800m freestyle, made sure of a relay place by the 200m freestyle in a quality 1:57.15.Scot Caitlin McClatchey also clinched her world spot by taking third in 1:58.49.

“I’ll not swim the 200m individual event at the worlds, but I always love to do the 4 x 200m relay,” said 20-year-old Adlington. “It’s when we all come together and it’s a brilliant event. I wasn’t rested for this meet and I knew it was going to be a challenge. I had to make the top three, so to win was a bonus.”

Edinburgh’s Michael Jamieson won the 200m breasttsroke, beating his training partner and fellow-Scot Kris Gilchrist, who has already qualified for Rome.

His time of 2:11.17 was a personal best, but not quite god enough to clinch the world championship berth. Richard Webb, who was third yin Glasgow, had a time of 2:10 at the first set of trials in Sheffield in March.

“I’m really pleased with the swim and I have done enough to qualify for the World Student Games in Belgrade next month,” he said. “But it’s just slightly disappointing that I haven’t got the second place for the worlds.”

Edinburgh University’s Louise Pate snatched a bronze in the 100m butterfly and was the top Scot in 1:00.50. Wales’ Jemma Lowe, who finished fourth at the Olympics, won in 58.41 ahead of England’s Jessica Sylvester.

City of Glasgow’s Daniel Scott also took a bronze and was the best of the Scots with a time of 24.68 in the 50m butterfly, while Warrender’s Craig Hamilton .