British Medical Association Ends Formal Opposition to Cass Review After Completing Its Own Evaluation

The BMA announced it would carry out an evaluation of the Cass Review, raising concerns about weaknesses in the methodologies used in the review. It said that, in the meantime, implementation of the Cass Review should be paused. More than 1,400 doctors, 900 of whom are BMA members, signed an open letter calling for the BMA to drop its opposition to the Cass Review.

Some doctors resigned from the British Medical Association after being members for up to 50 years. The BMA’s membership base consists of 195,000 doctors.

Following criticism, the BMA council held a further vote in April 2026 to say it would approach its critique of the Cass Review neutrally. Dr. Hilary Cass said the BMA had no grounds on which to oppose her review.

She criticised the British Medical Association for its puzzling decision to oppose the findings of her review. Dr. Hilary Cass said the BMA had no evidence to back up its critique of her review. Dr. Hilary Cass said the BMA’s stance represented only a small minority of the medical profession.

She said the BMA’s critique was based on online sources mainly from the US. On Wednesday, May 6 2026, the BMA published its long-awaited critique of Cass’s work written by a task and finish group of 12 union members. Professor David Strain is the chair of the BMA’s board of science and lead author of the BMA’s critique of the Cass Review.

Professor David Strain told The Times that the baroness has been vindicated in the way she approached the data. He praised Dr. Cass’s methodological approach. " The BMA is holding on to one disagreement with the fallout from the Cass Review: doctors should still be able to prescribe puberty blockers, which were banned by the government.

U.S. medical association has supported the findings of the Cass Review. The American Society of Plastic Surgeons questioned some elements of gender affirming care in February 2026.