UKIP made significant gains as the Conservatives held their ground in the Eastern region in the European Elections.
UKIP polled 542,812, up from 313,921 at the previous election, and gained a seat at the expense of the Liberal Democrats.
But the three Tory MEPs in the region held their seats while Labour increased its share of the vote, meaning that MEP Richard Howitt kept his seat.
Full list of MEPs in the Eastern region
- Patrick O'Flynn - UKIP
- Vicky Ford - Conservative
- Richard Howitt - Labour
- Stuart Agnew - UKIP
- Geoffrey Van Orden - Conservative
- Tim Aker - UKIP
- David Campbell Bannerman - Conservative
European Elections are conducted on a proportional voting system with the seats are allocated roughly in proportion to the votes cast.
The seven MEPs elected for the Eastern region cover a huge single constituency covering Bedfordshire, Cambridgeshire, Essex, Hertfordshire, Norfolk and Suffolk.
Patrick O'Flynn, UKIP's new MEP and the party's Director of Communications, said the party must now build for the future ahead of a General Election.
– Patrick O'Flynn, UKIP MEP
"Voters in the east, as in the rest of the UK, are concerned about open door migration, about pressure on green field land and about living standards - but they also wanted to give the other parties a bloody nose and we have to recognise Ukip was a convenient vehicle for that."
Patrick O'Flynn added: "We now need to convince people to stick with us. We need to build on our strategy, work on our vision and broaden our agenda. If we do that we can be confident of winning seats in parliament."
Mr Howitt said Labour must acknowledge UKIP's success but not mirror their policies.
He added: "Labour has seen a big increase in its vote in this region but we must acknowledge the concerns that Ukip has tapped into - we do not reject those concerns but we do reject the prescription offered by Ukip, we say that Farage is a mirage."
Full election result in the Eastern region
- UKIP - 542,812 votes - 34% (+15% compared with 2009)
- Conservative - 446,569 - 28% (-3%)
- Labour - 271,601 - 17% (+7%)
- Green Party - 133,331 - 8% (-0.3%)
- Liberal Democrats - 108,010 - 7% (-7%)
- An Independence From Europe - 26,564 - 2%
- English Democrats - 16,497 - 1%
- British National Party - 12,465 - 1%
- Christian Peoples Alliance - 11,627 - 1%
- NO2EU - 4,870 - 0.3%
The Liberal Democrat Andrew Duff lost the seat in the European Parliament that he has held since 1999.
Eurosceptic Conservative MPs said the results from across Europe proved their point.
Harwich and North Essex MP Bernard Jenkin wrote on Twitter: "Some of us who opposed Maastricht 20 years ago predicted it would lead to the rise of the right in the EU: and here we are."
Douglas Carswell, the Clacton MP, said: "So maybe those of us who sometimes banged on about Europe were on to something?"