The Conservatives twice followed local election victories in the 1980s with bigger general election wins

Conservative

Labour

Lib/SDP

44

43

40

39

38

30

20

10

0

May ‘83

June ‘83

May ‘87

June ‘87

Conservative

Labour

Lib/SDP

44

43

40

39

38

30

20

10

0

May ‘83

June ‘83

May ‘87

June ‘87