A transgender clinic has been hit by 35 resignations in three years, as psychologists warn of “overdiagnoses” of gender dysphoria among children.

The whistleblowers said too many children were being put on puberty-blocking drugs when they should not have been given the diagnosis.

Former staff said they were unable to properly assess patients over fears they will be branded "transphobic".

The concerns were raised by six psychologists who have resigned from London's children's gender-identity service in the past three years.

One psychologist, who wished to remain anonymous, said: "Our fears are that young people are being over-diagnosed and then over-medicalised.

"We are extremely concerned about the consequences for young people... For those of us who previously worked in the service, we fear that we have had front row seats to a medical scandal."

Thirty-five psychologists have resigned from London's Gender Identity Development Service (GIDS) at the Tavistock and Portman NHS Foundation Trust since 2016, the investigation by Sky News reveals.

One psychologist said: "The alarm started ringing for me... I didn't feel able to voice my concerns, or when I did I was often shut down by other affirmative clinicians. Looking back there are young people who I now wouldn't necessarily put on medication."