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Polls have closed in the European elections as political parties await their fate - with Theresa May and the Conservatives bracing themselves for damaging results.

Results will be announced after 10pm on Sunday, when the final polls have closed across Europe.

However, opinion polls suggest Nigel Farage's Brexit Party is set to emerge victorious in the elections, which are only taking place because of the delay to Brexit.

Seventy-three MEPs will be elected to represent the UK - with four of them coming from Wales.

Both Mrs May and Labour's Jeremy Corbyn could face a backlash from voters, while Mr Farage's party and - from the opposite side of the Brexit divide - the Liberal Democrats expected to pick up votes.

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The European elections took place almost three years after the UK voted to leave the EU because of Mrs May's failure to get her Brexit deal through Parliament.

The late confirmation on May 7 that voters would go to the polls was highlighted by the Electoral Commission as a factor in the difficulties faced by some EU citizens in casting their ballots.

The 3 Million group, which campaigns for the rights of EU citizens in the UK, demanded a full investigation of the "democratic disaster".

"These European elections are significant to so many EU citizens as this might potentially be the last nationwide vote before our voting rights will be downgraded to potholes and bin collections in local elections," a spokesman said.

"The Electoral Commission, but also local authorities, must urgently answer why so many people were denied their right to vote.

"It is outrageous that the incompetence and unwillingness of the Government and the Electoral Commission have denied these people a vote."

Ahead of the results, Mr Farage issued a warning to Westminster's politicians that his Brexit Party would be coming for their jobs ahead of his expected success.

He said: "This time they will realise it isn't just the votes we get today, it's what we might get at a general election that would cost them all their jobs.

"So they better listen to what people have to say today or they'll all be unemployed."

PM Mrs May put a brave face on as she went to cast her vote in Maidenhead following a difficult week - which saw Andrea Leadsom resign from her cabinet.

In a polling day video message, Mr Corbyn warned that "Britain was "at a crossroads".

During a campaign visit to Worthing, he added: "This Government can't last very long.

"And so, get ready for a general election."

However, in Wales former Welsh Government minister and Labour AM Leighton Andrews said he voted for the Greens saying his former party were a "pro-Brexit anti-Semitic shambles".