Gordon Jackson Rees (1918 – 2001) was a British anaesthetist. He laid down the foundations for paediatric anaesthesia. Jackson Rees T-Piece, circuit and T-tube
Thomas Philip Ayre (1901-1979) was an English anaesthetist. Ayre is most well-known for his eponymous T-piece, a device which revolutionised anaesthesia for babies and children.