Having smashed Mark Foster’s 50m freestyle national record that had stood for nearly 15 years on Thursday evening at Ponds Forge, Proud then broke the 100m freestyle mark.
Proud clocked a storming 46.69 seconds for the 100m, which broke Adam Brown’s previous British record of 46.75, which had stood since 2009.
The University of St Mark and St John student was nearly a second in front of Loughborough’s James Disney-May in second, with former Plymouth College pupil Calum Jarvis third.
There was also medal joy for Plymouth Leander’s 4x100m women’s freestyle relay team, who won bronze in a time of 3:40.83.
The quartet, made up of Jessica Jackson, Felicity Passon, Emma England and Juliette Casini, finished behind Sheffield and Stockport Metro respectively.
Former Leander and Plymouth College swimmer Joe Hulme, who has now moved to Bath University, won silver in the 400m IM, finishing in a time of 4:14.50.
Current Plymouth College pupil Laura Stephens finished 10th in a tight 50m butterfly final clocking 27.28 seconds, while Adam Milme came in the men’s 50m backstroke final in 24.91. Tom Rudd came fourth in the 50m backstroke B final and Darren Lim was fourth in the 100m freestyle B final in 49.45.