Earnest Stewart Cox (1900-1992), was born in Glasgow in 1900 and educated at Merchant Taylors School, Crosby. He joined the Lancashire & Yorkshire Railway as a premium apprentice in the Mechanical Engineers Department at Horwich in 1917. He later went on to become a Draughtsman at Derby and Euston.

In 1934 Cox became the Assistant Works Superintendent in Derby, progressing to become the Development Assistant in the Chief Mechanical Engineers Department in 1935. By 1937 Cox had moved to Euston, taking on the role of Personal & Technical Assistant, where he stayed until 1940. He moved back to Derby and became the Chief Technical Assistant to the Chief Mechanical Engineer. In 1941, he took on the role as Executive Officer (Design) at the Railway Executive Headquarters and later moved on to become the Mechanical Engineer (Development) for the British Transport Commission. He was promoted to Assistant Chief Mechanical Engineer in 1958. Cox finally became the Mechanical & Electrical Engineer (Design & Development) in 1960. He passed away in Berkhamsted, on the 14th September 1992.