Ireland’s Barry Murphy set a new national record at the World Championships this morning, while Sycerika McMahon recorded a personal best, but both failed to progress from their heats in Barcelona.

Murphy, who finished fifth in his heat and 18th overall, clocked 23.65 seconds in the 50 metres butterfly, lowering his previous record of 24.21.

South African 50m freestyle world record holder Roland Schoeman was the fastest qualifier in an impressive 23.02.

“The goal time coming in was 23.6 and to do it was great,” said Murphy.

“I would have liked to get a semi-final but we’re at this level and everyone is swimming fast. This swim puts me in a good place for the 50m breaststroke in two days.”

McMahon finished eighth in her heat and 18th overall in the 200m individual medley in 2:14.38.

Hungary’s Katinka Hosszu was the fastest qualifier in 2:08.45.

“I’m happy that I did a personal best, it being so close to a semi-final position (top 16) though is a downside to it,” admitted McMahon.

“But I’ve still got the 100m freestyle left so I’ll just go all out for that.”

Fiona Doyle will be the only Irish swimmer in action tomorrow when she takes to the pool for the heats of the 100m breaststroke, an event in which she won silver at the World University Games in Russia earlier this month.