Largest net seat gains since 1945 by election year and party

Conservative

Labour

239

211

146

96

90

77

62

59

1945

2024

1997

2010

1950

1970

1979

1964

Conservative

Labour

239

211

146

96

90

77

62

59

1945

2024

1997

2010

1950

1970

1979

1964