[3][6][7][8] In December 2020, she was added to UEFA's elite women's list, joining other female football officials to referee at international games, including Stéphanie Frappart of France and Bibiana Steinhaus of Germany.

[9][10] Welch's appointment to referee the Harrogate v Port Vale match was announced by the Football Association on 30 March 2021.

[18][19][20] In November 2023, Welch was allegedly the subject of misogynistic chanting during a match between Birmingham City and Sheffield Wednesday; two 17 year olds were subsequently arrested.

[24] In May 2024, Welch adjudicated the Women's Champions League final between Barcelona and Lyon at the San Mamés Stadium in Bilbao.

[26][27][28] In August 2024, the PGMOL announced that Welch was to retire from officiating and that she would become their manager of the Select Group Women’s Professional Game.

[29] In December 2024, Welch was inducted into the WSL Hall of Fame alongside players Gilly Flaherty, Alex Scott and Steph Houghton.