My father, William Tipler, known as Bill, who has died aged 95, was an engineer who served at Bletchley Park during the second world war before going on to a long career with Shell Oil.
He was born the fifth of six children in Watford, to William Tipler, a teacher (later headteacher), and Grace (nee Morton). He excelled academically, attending Watford grammar school for boys and gaining an exhibition to Queens’ College, Cambridge to read mathematics. Due to the war, he opted to complete his degree in two years, graduating with a first in 1943. He represented Queens’ at chess, and was noted for his reckless attacking.