Commonweath champion Robbie Renwick completed a freestyle double, taking the 200m and 400m titles at the Scottish Gas National Championships.
He continued his preparation for the World Championships by beating Rob Bale by almost two seconds in the 200m.
Renwick will be competing in the individual 200m and 400m freestyle events in Shanghai later this summer.
"While I hoped my times would be a little faster, I'm still in hard training," said Renwick.
Rob Bale of Carnforth took silver, while Blackburn's Josh Walsh picked up the bronze ahead of Stirling's Jak Scott.
Lewis Smith also continued his medal winning ways, powering to victory in the 400m individual medley final ahead of nearest rival Taki Mrabet, of Tunisia, while Ross Muir collected bronze.
Earlier, Hannah Miley and Michael Jamieson picked up golds in the 400m individual medley and 200m breaststroke respectively.