Career
He worked as a railway goods agent, and was elected to Sale Borough Council in 1932 (serving until 1935) and 1945 (retiring the following year). At the 1950 general election he fought Northwich as the Labour candidate. In 1951 he fought Stretford and in 1955 he was the candidate in Oldham East.
This was the only seat in England which went from Conservative to Labour at that election.
Mapp was re-elected at the 1964 and 1966 elections. He retired at the 1970 general election.
