European Parliament election, 1999 (UK)

United Kingdom European Parliament election, 1999

← 1994 10 June 1999 2004 →
← outgoing members Members elected →
All 87 seats of the United Kingdom's seats in the European Parliament
Turnout	24%
First party Second party Third party   Leader William Hague Tony Blair Paddy Ashdown Party Conservative Labour Liberal Democrat Alliance EPP–ED PES ALDE Leader since 19 June 1997 21 July 1994 16 July 1988 Last election 18 seats, 26.8% 62 seats, 42.6% 2 seats, 17% Seats won 36 29 10 Seat change 18 33 8 Popular vote 3,578,218 2,803,821 1,266,549 Percentage 33.5% 26.3% 11.9% Swing 6.5% 16.4% 4.3%
Colours denote the winning party, as shown in the main table of results †Notional results calculated by House of Commons Library showing 1994 result if conducted under proportional representation.
Leader of Largest Party before election Tony Blair Labour Subsequent Leader of Largest Party William Hague Conservative

Tony Blair
Labour

William Hague
Conservative

The European Parliament Election, 1999 was the United Kingdom's part of the European Parliament election 1999. It was held on 10 June 1999. Following the European Parliamentary Elections Act 1999, it was the first European election to be held in the United Kingdom where the whole country used a system of proportional representation. In total, 87 Members of the European Parliament were elected from the United Kingdom.

The change in voting system resulted in significant changes in seats. The Conservatives won double the number of seats they had won in the previous European election, in 1994, while the Labour Party saw its seats reduced from 62 to 29. The Liberal Democrats saw their number of seats increase to 10 from just 2 in the previous election. The UK Independence Party (UKIP), Green Party and Plaid Cymru gained their first ever seats in the European Parliament.

The House of Commons Library calculated that if the 1994 European elections had been held under proportional representation, Labour would have won 43 MEPs, the Conservatives 26, the Lib Dems 11, the SNP 3 and Plaid Cymru 1, and that notional seat changes were Conservatives up 10, Labour down 14, Lib Dems down 1, UKIP up 3, Greens up 2, SNP down 1, Plaid Cymru up 1 and DUP, SDLP and UUP unchanged. The notional results and seat changes are shown in the results box for this article.

It was the first European Parliament election to be held since the 1997 general election which resulted in a change of government from Conservative to Labour.