Background
Pennington was born in Bawtry, Yorkshire.
Pennington was born in Bawtry, Yorkshire.
He was educated at Loughborough Grammar School, and Jesus College, Cambridge.
During World World War II he served as a Radar Officer in the Royal Naval Volunteer Reserve, before returning to Cambridge to complete his doctorate under Albert Edward Ingham. After completing his doctorate, he spent two years at Harvard University, returning to a Research Fellowship at Jesus in 1952. He was appointed Reader in mathematics at Westfield College, University of London in 1953.
In 1961 he was appointed Professor of Pure Mathematics at University College of Wales, Aberystwyth, in succession to Victoria Cross Morton, and where he remained until his death, aside from the 1959-1960 academic year which he spent at McMaster University in Hamilton, Ontario.