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Voters' anger over austerity and Brexit cost the Conservatives their majority at the General Election, the Prime Minister's new chief of staff has said.

Gavin Barwell admitted Labour leader Jeremy Corbyn had been able to tap into frustrations over public sector pay and concerns among Remain-supporters over the Tory approach to leaving the European Union.

The former housing minister lost his Croydon Central seat in Thursday's vote but made a swift comeback after being brought into Number 10 as her senior aide.

In a sign that he will push for a change in approach on Brexit, he said: "We do need to make sure that people that are Conservative-minded that voted Remain in the referendum are happy to continue supporting our party."

In an interview with the BBC's Panorama programme, conducted in the brief period between losing the election on Friday and being appointed as the replacement to Mrs May's aides Nick Timothy and Fiona Hill on Saturday, Mr Barwell identified the reasons why he had lost his Croydon Central seat.

He said: "There's a conversation I particularly remember with a teacher who had voted for me in 2010 and 2015 and said 'you know, I understand the need for a pay freeze for a few years to deal with the deficit but you're now asking for that to go on potentially for 10 or 11 years and that's too much'.

"That is something that Jeremy Corbyn was able to tap into."

There was also "clearly evidence" that Brexit had been an issue in the outer London constituency, Mr Barwell added.

He said: "We are very clear in my seat that the area of the constituency where Labour did best was the area that had voted heavily for Remain.

"So there's clearly evidence, I think, that people that are angry about Brexit still, Jeremy Corbyn somehow managed to get them behind him."

Mr Barwell was brought into Number 10 after Mrs May's close allies Mr Timothy and Ms Hill stood down following the party's electoral disaster.

He lost to Labour's Sarah Jones by more than 5,000 votes in Croydon Central, having held off her challenge by just 165 ballot papers in 2015.

After his victory two years ago, Mr Barwell published a book titled How to Win a Marginal Seat.