London West was a constituency electing one Member of the European Parliament (MEP) by the first-past-the-post system. It was created in 1979 and abolished in 1999 when it was replaced by the multi-member London Constituency, using a system of proportional representation.
European constituencies were formed by the grouping of UK Parliamentary (Westminster) constituencies.
When London West was created in 1979 it consisted of eight Westminster constituencies: Acton, Brentford and Isleworth, Ealing North, Feltham and Heston, Hayes and Harlington, Ruislip-Northwood, Southall, Uxbridge.
United Kingdom Parliamentary constituencies were redrawn in 1983 and the European constituencies were altered in 1984 to reflect this. The revised seat comprised the following Westminster constituencies: Brentford and Isleworth, Ealing Acton, Ealing North, Ealing Southall, Feltham and Heston, Hammersmith, Richmond and Barnes and Twickenham. The same boundaries were used in 1989 and 1994. 
The Wikipedia page is .
- ↑ David Boothroyd's United Kingdom Election Results. Retrieved on 2008-01-20.
- ↑ "European Elections 84. Candidates named for European Parliament elections on June 14". The Times: p. 5. 16 May 1984.
- ↑ "378 candidates fight the 81 UK European seats; European Elections 1989". The Times. 19 May 1989.
- ↑ Whitaker's Concise Almanack 1995. London: J Whitaker & Sons Ltd.. 1994. p. 277. ISBN 0850212472.