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David Cameron seemed tetchy and irritable during a disastrous interview on Radio 1 last night when he was quizzed by teenage listeners.

During the 30 minute Q&A, he admitted he didn't know how much the living wage was and got a kicking over VAT on female sanitary products.

He also refused to rule out a post-election deal with the Democratic Unionist Party (DUP) despite their position on gay rights.

The red-faced millionaire was quizzed on Radio 1’s Newsbeat programme over the rate experts calculate is needed to give a decent standard of living – £7.85 outside London and £9.15 in the capital.

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READ: Forget the SNP, the DUP Tory coalition is the one you should worry about

He was asked four times in a cringeworthy exchange, before finally giving up and confessing: “I don’t have the figures in my head.”

Listeners thought the Prime Minister sounded flustered during the interview, which has been described as a "mauling".

He was also taken to task over his willingness to collaborate with the DUP should the Tories not win a majority.

Mary Hassan, from Londonderry, Northern Ireland, told the Tory leader the DUP had "voted consistently against government bills to prohibit discrimination on the basis of sexual orientation.

"They've consistently blocked motions for marriage equality and uphold a gay blood ban and currently are putting forward the conscience clause bill.

"Now, I'd like to know - is staying in office more important that the LGTB community in Northern Ireland?" she asked.

During a tetchy exchange, Cameron said: "I totally disagree with the DUP about this" - but failed to rule out doing a deal with them to cling on to power.

He insisted he didn't want to go into coalition with anyone - but both the audience and presenter Chris Smith wouldn't take that as an answer.

Smith even offered a £1,000 bet that he wouldn't win a majority.

Cameron also seemed flustered over VAT on female sanitary products.

He said: “I wish we could get rid of this… There’s a problem with getting rid of VAT on certain individual issues because of the way this tax is regulated and set in Europe.”

He added that he found the situation “frustrating.”

Since the interview was broadcast yesterday, many have taken to social media to pick holes in the PM's answers.

Ed Miliband has been proving rather more of a hit with teenagers recently, with young supporters managing to rebrand the Labour leader as a hearthrob.

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