The modern Preston is a safe seat for Labour, but historically Preston North was one of the most marginal constituencies in the country.
Boundaries
1950–1974: The County Borough of Preston wards of Deepdale, Fishwick, Moorbrook, Park, and Ribbleton, and the Urban District of Fulwood.
1974–1983: The County Borough of Preston wards of Deepdale, Fishwick, Moorbrook, Park, St Matthew's, and Ribbleton, and the Urban District of Fulwood. The constituency boundaries remained unchanged.