Prior to its uniform adoption of proportional representation in 1999, the United Kingdom used first-past-the-post for the European elections in England, Scotland and Wales. The European Parliament constituencies used under that system were smaller than the later regional constituencies and only had one Member of the European Parliament each.

The constituency of London South West was one of them.

1979–1984: Battersea North, Battersea South, Kingston upon Thames, Lambeth Central, Putney, Richmond (Surrey), Surbiton, Tooting, Twickenham, Vauxhall.

1984–1994: Battersea, Epsom and Ewell, Kingston upon Thames, Mitcham and Morden, Putney, Surbiton, Tooting, Wimbledon.

1994–1999: Battersea, Kingston upon Thames, Mitcham and Morden, Putney, Streatham, Surbiton, Tooting, Wimbledon.

Shelagh Roberts was disqualified as she was a member of the Occupational Pensions Board. She resigned from the board and contested the subsequent by-election.