[1] It was formed in March 2019,[2] with an international roster of swimmers including Adam Peaty who was among the first to support the formation of ISL independent of FINA.

[5] Six swimmers were named as co-captains in seasons one: Sydney Pickrem, Kyle Chalmers, Adam Peaty, Mireia Belmonte, Cate Campbell and James Guy.

[6] Peaty and Pickrem were initially announced as captains in the second season,[7] followed by Alia Atkinson and Guilherme Guido.

[10][11] As of 2020[update], the team roster is: London Roar reached the final of the first season of the International Swimming League in 2019 in Las Vegas, and finished second behind Energy Standard.

[5] Team member Adam Peaty broke the short-course 100m breaststroke world record twice.