[3] The constituency corresponded to the Greater London region of England, in the south east of the United Kingdom.

The European Parliamentary Elections Act 1999 reduced this to a single constituency returning a number of MEPs.

The number of seats allocated to London had been reduced from 10 to 8 between 1999 and 2009 due to EU enlargement.

Brackets indicate the number of votes per seat won and order of MEPs elected.

The 2014 results were delayed by Tower Hamlets, where there were recounts needed for six local election wards.