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Labour figures have branded David Cameron ageist after he called die-hard left-winger Dennis Skinner 'Jurassic Park' in a shouty Commons exchange.

The Labour MP slammed the PM today over the closure of Doncaster's Hatfield Colliery, one of Britain's three remaining deep coal mines.

But his reply prompted Mr Skinner's Labour colleagues to accuse the PM of being crass - with grandee John Prescott declaring: "Guy's got no class".

The 83-year-old yelled at the top of his lungs over MPs' jeers to attack Mr Cameron's Eton schooling and declared: "No wonder they call him dodgy Dave!"

And he laid into the government for draining £700m from the mineworkers' pension scheme last year after deciding it was bigger than needed.

"For a man who's seemingly never away from Europe, why is it that he's never taken the opportunity to put in a claim for state aid to save British miners' jobs?" he declared.

"He's the man who during the election campaign masqueraded as the workers' champion and he hasn't got the guts to help those miners.

"He took £700m out of the mineworkers' pension scheme and he's not given a penny back.

"No wonder they call him Dodgy Dave... A man who went to Eton.."

The rest of the MP's pronouncements were drowned out by jeers as Speaker John Bercow tried desperately to restore order.

"It's very good to see the Labour party in full voice cheering on Jurassic Park," joked David Cameron.

"I would stick to the movie."

He added: "This Government has offered £20m to the owners of Hatfield Colliery to keep that colliery going so we have been prepared to put forward money.

"And unlike the last government we've been prepared to make some ministerial directions because we've got some courage when it comes to these things."

An MP since 1970, so-called Beast of Bolsover Mr Skinner is known for his aggressive Commons style.

He was famed for his one-line quips at the State Opening of Parliament, but missed out this time for the first time in years.