In the all-around competition she scored 14.200 on the vault, 12.800 on the uneven bars, 12.200 on the balance beam and 13.900 on the floor which gave her a final total of 53.100, almost half a point lower than her English Championships score, for joint fourth place with Angel Romaeo.

[6] On 23 April it was announced by the British Olympic Association that Simm was to represent Great Britain at the first ever European Games.

Simm was originally selected to compete alongside 2012 Olympian Rebecca Tunney and senior newcomer Tyesha Mattis, but both withdrew due to injuries.

On 2 June it was released by British Gymnastics that Simm was to now compete with double 2014 Commonwealth Games bronze medalist Georgina Hockenhull and 2014 World Championships reserve athlete Charlie Fellows.

[25] In April Simm competed at the 2018 Commonwealth Games alongside Georgia-Mae Fenton, Taeja James, Alice Kinsella, and Lucy Stanhope.

Individually Simm placed fifth in the all-around, sixth in the uneven bar final, and won bronze on balance beam behind compatriot Kinsella and Georgia-Rose Brown of Australia.

She was later selected to compete at the 2019 European Championships alongside Ellie Downie, Alice Kinsella, and Amelie Morgan.

[32] In late January it was announced that Simm would compete at the Stuttgart World Cup taking place in March.

[34] In June Simm was selected to represent England at the 2022 Commonwealth Games alongside Ondine Achampong, Georgia-Mae Fenton, Claudia Fragapane, and Alice Kinsella.