The Wythenshawe Swing

Between 1950 and 2005 the biggest swing to the Conservatives in either Manchester Wythenshawe or Wythenshawe & Sale East was 3.4% in 1970.

Swings:

Manchester Wythenshawe:
1951: 0.4% to Con
1955: 3.6% to Lab
1959: 1.7% to Lab
1964: 5.4% to Lab
1966: 4.4% to Lab
1970: 3.4% to Con
1974F: 7.7% to Lab (ignoring any boundary changes that might have taken place)
1974O: 3.0% to Lab
1979: 2.5% to Con
1983: 0.7% to Con
1987: 6.1% to Lab
1992: 2.0% to Lab

Wythenshawe & Sale East:
1997: 9.2% to Lab
2001: 1.5% to Lab
2005: 3.0% to Con
2010: 5.9% to Con

Thanks to ANDYAJS for collating this information.