B, the plaintiff, claimed damages against the defendants in respect of injuries that he received while undergoing electroconvulsive therapy (ECT) on 23 August 1954 at Friern Hospital. Medical evidence was called by both sides. No one suggested that there was any negligence in the diagnosis or in the decision to use ECT. However, there were different variants as to the use of restraining sheets, relaxant drugs, and manual control of the patient’s body. The question was whether Dr A, following the practice that he had learned at Friern Hospital and following the technique that had been shown to him by Dr B, was negligent in failing to use relaxant drugs or, if he decided not to use relaxant drugs, that he was negligent in failing to exercise any manual control over the patient beyond merely arranging for his shoulders to be held, his chin supported, a gag used, and a pillow put under his back. McNair J, in summing up to the jury, said, at 586–7: