In 1979, the Conservative
party won 43.9 per cent of the votes cast and 53.4 per cent of the seats. Four years
later, it won 42.4 per cent of the votes but 61.1 per cent of the seats. In 1987, its
shares of the votes and seats were 43.4 and 57.8 per cent respectively, and then in
1992 its vote share fell slightly, to 42.3 per cent, but its share of the seats fell more
sharply – to 51.6 per cent. Labour won in 1997, with 43.3 per cent of the votes and
63.6 per cent of the seats. Thus over five elections, whereas the leading party’s share
of the votes only ranged between 42.3 and 43.9 per cent its share of the seats varied
more, from 51.6 to 63.6 per cent. With virtually the same share of the votes at four
successive elections the Conservatives won very different shares of the seats, and then
when Labour won with the same vote percentage its share of the seats was larger than
the Conservatives ever achieved.
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