Rebecca Adlington returned to the pool 14 hours after giving an 800metres freestyle masterclass to set the fastest time in the heats of the 400m at the British Gas ASA National Championships in Sheffield.
Adlington tops the world rankings in both the 800m and 400m and she produced a powerful, controlled swim this morning to touch in four minutes 13.84 seconds with Hannah Miley and Eleanor Faulkner the next fastest.
The 22-year-old has already qualified for next month’s World Championships in Shanghai at the first trials in Manchester but will still contest tonight’s final despite being in heavy training.
Miley then returned to dominate the 400m individual medley heats.
The Garioch swimmer is European and Commonwealth champion in the eight-length event and has already made Shanghai but a second place is available.
Jemma Lowe, who pipped European silver medallist Fran Halsall to the second spot alongside Ellen Gandy in the 100m butterfly earlier this week, was fastest by almost five seconds in the 200m heats.
The Swansea Performance swimmer has already qualified for this event with Gandy.
Former four-time European junior champion Anne Bochmann is second fastest.
Grant Turner headed the 100m freestyle heats into tonight’s decider with both places for the Great Britain team up for grabs.
British record holder Simon Burnett, winner last night over 50m, also progressed.
Xavier Mohammed leads the 200m individual medley although James Goddard and Joe Roebuck claimed the two spots available in Manchester.
Kris Gilchrist heads the 200m breaststroke but again both places have been filled.
Daniel Cocking won the 1,500m freestyle (16:06.22) with tonight’s other heat deciding the winner.