There is currently no data to reflect the number who may be unhappy in their new gender or who may opt to detransition to their biological sex.

Charlie detransitioned and went public with her story last year – and said she was stunned by the number of people she discovered in a similar position.

“I’m in communication with 19 and 20-year-olds who have had full gender reassignment surgery who wish they hadn’t, and their dysphoria hasn’t been relieved, they don’t feel better for it,” she says.

“They don’t know what their options are now.”