England

Constituency
Nottingham East (1885 - 1955)
Nottingham East (1974)
Nottingham North (1955 - 2024)
Nottingham North and Kimberley (2024)
Nottingham North West (1950 - 1955)
Nottinghamshire Northern (1832 - 1885)
Nottinghamshire Southern (1832 - 1885)
Nottingham South (1885 - 1974)
Nottingham South (1983)
Nottingham West (1955 - 1983)
Nottingham West (1885 - 1950)
Nuneaton (1885)
Old Bexley and Sidcup (1983)
Oldbury and Halesowen (1950 - 1974)
Oldham (1832 - 1950)
Oldham Central and Royton (1983 - 1997)
Oldham East (1950 - 1997)
Oldham East and Saddleworth (1997)
Oldham West (1950 - 1997)
Oldham West and Royton (1997 - 2024)
Oldham West, Chadderton and Royton (2024)
Ormskirk (1885 - 1983)
Orpington (1983)
Orpington (1918 - 1974)
Osgoldcross (1885 - 1918)