Sutton and Cheam MP Paul Burstow is the latest politician to be exposed by the Daily Telegraph in an undercover 'sting'.

Following on from Twickenham MP Vince Cable and Kingston MP Ed Davey, care minister Mr Burstow is the latest high-profile Liberal Democrat to be highlighted as doubting the strength of the coalition government.

The Daily Telegraph quoted Mr Burstow as saying: "I don't want you to trust David Cameron ... in the sense that you believe he's suddenly become a cuddly Liberal. Well, he hasn't. He's still a Conservative and he has values that I don't share."

And when asked whether Chancellor George Osborne was out of touch, Mr Burstow reportedly said: "There are going to be some Conservative politicians in particular who are detached from reality."

Now, Mr Burstow has said he regrets making the comments and that the Prime Minister has his "complete trust".

He said: "Naturally I regret the comments I have made and I apologise for any offence caused. I want to make clear that the Prime Minister has my complete trust.

"Two ladies came to my constituency surgery. They claimed to be Lib Dem supporters concerned about the Coalition. I was seeking to make clear that I have not become a Conservative anymore than the Prime Minister has become a Liberal Democrat.

"We are two parties with separate identities. We've come together in the national interest to implement an agreed programme for government to sort out the economic mess we inherited.

"I'm surprised that after 13 years of arguing in public between the Blair-Brown New Labour coalition, that policy disagreements between two different parties should come as a surprise to anyone."

The Daily telegraph stories, run throughout the week, have sent shock waves through the coalition, with business secretary Vince cable quoted as saying he could "bring the Government down".

Mr Cable was also stripped of powers after announcing he had "declared war" on media tycoon Rupert Murdoch.

Prime Minister David Cameron called his comments "totally unacceptable".

Then, on Tuesday, Kingston and Surbiton MP Ed Davey was quoted as saying he was "gobsmacked" at plans to cut child benefit for higher-band taxpayers.