[5] In July 2015, TSSA endorsed Jeremy Corbyn's campaign in the Labour Party leadership election.

[6] TSSA National Political Officer, Sam Tarry spearheaded Corbyn's second leadership campaign.

In early 2022, the union was granted an injunction on an employee who has accused Manuel Cortes, the general secretary of the TSSA of sexual harassment and of bullying by senior staff members.

[14] An earlier critical report which concluded that equality, diversity and inclusion objectives were not being met was not made public until February 2023.

Later in 2023 TSSA members elected a new General Secretary, Maryam Eslamdoust, who was the first woman and the first person of colour to hold the post.