London North West was a constituency that elected a single Member of the European Parliament (MEP). It was created in 1979 and abolished in 1999 when it was replaced by the multi-member London constituency.
The European constituency was formed by the grouping of eight parliamentary constituencies used for the elections of members of the UK House of Commons: Brent East, Brent North, Brent South, Chipping Barnet, Harrow Central, Harrow East, Harrow West, Hendon North and Hendon South.
United Kingdom Parliamentary constituencies were redrawn in 1983 and the European constituencies were altered to reflect this. The new seat comprised the following Westminster constituencies: Brent East, Brent North, Brent South, Harrow East, Harrow West, Hayes and Harlington, Ruislip-Northwood and Uxbridge. The same boundaries were used in 1984, 1989 and 1994. 
The seat was won by Lord Bethell of the Conservative Party at the first election in 1979. In 1994 Bethell lost the seat to Robert Evans, of the Labour Party. Evans held the seat until its abolition in 1999.
The Wikipedia page is [https://en.wikipedia.org/wiki/London_North_West_(European_Parliament_constituency).
- ↑ David Boothroyd's United Kingdom Election Results. Retrieved on 20 January 2008.
- ↑ "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.