BBC presenter Nick Robinson was booed by a crowd at a union event in Bournemouth after the speaker Ken Loach accused him of bias and impartiality.

The veteran filmmaker suggested Robinson had ousted himself as a Conservative in a recent tweet which claimed the Labour leader was “long on passion and short on details”.

Appearing on stage at the Communication Workers Union event, Loach read out the tweet which was sent last Thursday.

“The Today Programme on BBC have a presenter called Nick Robinson,” the 80-year-old said prompting audible boos from the audience.

“He showed his impartiality yesterday. Did anybody read this? He said ‘No one should be surprised that Jeremy Corbyn is running against the Establishment and is long on passion and short on details. Story of his life’.”

“That’s Nick Robinson, ex-member of the Conservative Party," Loach continued. "That’s the partiality of the BBC. That’s the bias we have to complain about. That’s what we have to fight.”

Labour leadership contest: Jeremy Corbyn vs Owen Smith Show all 8 1 /8 Labour leadership contest: Jeremy Corbyn vs Owen Smith Labour leadership contest: Jeremy Corbyn vs Owen Smith Jeremy Corbyn and Owen Smith clash at a leadership hustings in Gateshead, where Mr Smith was scarcely able to answer a question without being booed by Mr Corbyn’s supporters PA Labour leadership contest: Jeremy Corbyn vs Owen Smith “Jeremy himself admitted he was seven out of 10 in terms of his faith in the European Union. He said it,” said Mr Smith during his second live debate with Jeremy Corbyn Getty Labour leadership contest: Jeremy Corbyn vs Owen Smith Ballot papers are currently due to be sent out on 22 August and returned a month later, with the result being announced at a special Labour conference on 24 September Getty Labour leadership contest: Jeremy Corbyn vs Owen Smith Jeremy Corbyn supporters cheer and wave placards as the Labour Leader addresses thousands of supporters in in Liverpool, England Getty Labour leadership contest: Jeremy Corbyn vs Owen Smith Labour Party leadership candidate Owen Smith poses for a picture with supporters during a picnic for young members in London Fields, Hackney in London Getty Labour leadership contest: Jeremy Corbyn vs Owen Smith The Labour leader has a spring in his step at a leadership rally in Sunderland Screenshot Labour leadership contest: Jeremy Corbyn vs Owen Smith Labour leadership contender Owen Smith delivers a speech at the Open University in Milton Keynes, where he promised to reverse Conservative cuts set to leave millions of low paid workers thousands of pounds a year worse off PA Labour leadership contest: Jeremy Corbyn vs Owen Smith Shadow Chancellor John McDonnell has urged Owen Smith to distance himself from those saying they want to split the Labour party Getty

Before embarking on a career in journalism, Robinson was President of the Oxford University Conservative Association.

Loach, who is famed for making films which explore social issues such as poverty and labour rights, argued Mr Corbyn had been on the “right side of history” throughout his life.

Responding to the speech, Robinson insisted he gave "impartial interviews".

"I judge Ken Loach by the quality of the work he produces," he told The Independent. "He is a great film maker. I think he should judge me in the same way - by the impartial interviews I do which are rigorous with all sides"

Robinson sought to clarify the controversial tweet in a Facebook post at the time.

“When I tweeted earlier that people should not be surprised by Jeremy Corbyn's approach as it was ‘the story of his life’ some read it as being pejorative and evidence of that establishment sneering. I meant no such thing,” he wrote.

“My point was that the Labour leader is doing what he has done for decades and what brought him huge and unexpected success in his party. So no-one should expect him now to change his approach.”

“I, on the other hand, will read my tweets twice to check they don't read as if I mean something I never intended.”