Jo Jackson and Lizzie Simmonds sealed their places in Great Britain’s world championship squad with wins at the National Championships in Sheffield.
Both swimmers failed to qualify at the first trials in Manchester in March but were lucky second time round.
Jackson produced her fastest time for two years to win the 400m freestyle in one minute 58.32 seconds.
Simmonds won the 200m backstroke in a time of 59.86 seconds to take the last squad place left for the event.
The return to form of Olympic bronze medallist Jackson was particularly heartening after 18 months of ill-health and severe asthma problems.
“I wanted to go quicker but to get the qualifying time and book my spot for the worlds, I can’t explain how happy I am,” she said.
“This time last year I didn’t think it would happen so I am so relieved and that is what the smile is for.
“It has been really hard but I put in a lot of effort these last few months changing so much and its definitely starting to pay off.”
Simmonds said the difference between her performance in Manchester and the one in Sheffield was all down to a more positive mental attitude.
“I’ve just been enjoying it,” she said.
“I had a dip there and found it quite hard to pull myself out of that.
“With not qualifying in the 100 I got a bit more down and when I didn’t qualify in the 200 it was the be all and end all.
“I then reassessed it and looked at my swimming and thought ‘this is something I should love doing’ and I do love doing it.”
The world championships take place in Shanghai from 16-31 July.
