Maurice Wilkes

Professor Sir Maurice Vincent Wilkes (26 June 1913, Dudley, Worcestershire — 29 November 2010) was a British computer scientist, called the "father of British computing".
Career.
He invented the first usable stored program computer called EDSAC (Electronic Delay Storage Automatic Calculator) at Cambridge University in 1949. 
He also developed the idea of using software to program a computer, instead of a fixed electronic circuit. He was knighted for his achievements in 2000.
Wilkes was the first President of the British Computing Society.