Putting all of his chances in just one event, the 5th fastest performer ever, Ben Proud will look to qualify for the Olympic Team in the 50 free tonight.
Olivia Newman-Baronius, 17, equals the S14 100m butterfly world record in her first major event to all but confirm her place at this summer's Paralympics.
Matthew Richards, the British record holder, leads the 100 Freestyle event, but a strong group behind, including Thomas Dean, will look to usurp his title.