Age: 20

Events: 800m Freestyle/ 1500m Freestyle

Club: Loughborough University / Larne Swimming Club

From Magheralin in Co Down, and now based at Loughborough University studying computer science, Wiffen is Irish senior record holder over the 800m and 1500m Freestyle. He became the first qualifier for Tokyo at the Irish trials in Dublin in June, clocking 7:52.68 in the 800m freestyle, 1.63 seconds inside the Olympic standard of 7:54.31. He started swimming with his identical twin brother Nathan aged three months old in the local Water Babies sessions. He is coached by Andi Manley.