1945 Sir Harold Gillies and his colleague Ralph Millard carried out female-to-male confirmation surgery on Michael Dillon. Sir Harold Gillies developed his pioneering pedicle flap surgery with injured soldiers from World War II. Initially developed as reconstructive surgery, phalloplasty is now offered as a genital surgery option for trans men. Dillon underwent at least 13 surgeries between 1946 and 1949 and was elected for surgery on the pretext of treating a malformation of the Urethra (hypospadias), in order to conceal the exact nature of the surgery.
His case is still used by Parliament today to highlight issues faced by members of the Trans communities.