[4][5][6] In October 2018, she was named as one of the twelve on-field umpires for the 2018 ICC Women's World Twenty20.
[12] In February 2022, she was named as one of the on-field umpires for the 2022 Women's Cricket World Cup in New Zealand.
[13][14] On 1 April 2022, the ICC named Cotton as one of the on-field umpires for the final of the tournament.
[16] Cotton became the first woman to stand in a men's T20I between two full members as an on-field umpire.
[17] In September 2024 she was named as part of an all-female officiating group for the 2024 ICC Women's T20 World Cup.