The ConservativeHome blog published an article by editor Tim Montgomerie today which cited opposition from top Tories in branding the controversial NHS plans as David Cameron's "greatest mistake."

Mr Montgomerie warned that the changes were "electorally fatal" and that there was a feeling the PM "isn't listening" to the party.

A picture of the Prime Minister sitting on a stick of dynamite with the letters NHS on it was published alongside the article.

Mr Montgomerie wrote: "Three Tory Cabinet ministers have now also rung the alarm bell. One was insistent the Bill must be dropped. Another said (Health Secretary) Andrew Lansley must be replaced.

"Another likened the NHS reforms to the poll tax. The consensus is that the PM needs an external shock to wake him to the scale of the problem."

He added: "David Cameron's greatest political achievement as leader of the opposition was to neutralise health as an issue.

"The greatest mistake of his time as PM has been to put it back at the centre of political debate."

A series of professional bodies including the British Medical Association, the Royal College of GPs and the Royal College of Nursing have aired strong opposition to the Health and Social Care Bill despite the coalition making more than 100 changes in a bid to appease them.

The blog confirms Labour leader Ed Miliband's claim during PMQs this week that "even the Tories don't trust the Tories on the NHS."

Shadow health secretary Andy Burnham said: "We already know that the PM isn't listening to doctors and nurses.

"But it's a shock to find out that even senior members of his own Cabinet have to take to a Conservative website to get through to him about the damage he is doing to the NHS.

"David Cameron promised to protect the NHS but every day he digs in behind his Bill he damages it further.

"He is out of touch with the people of Britain. He is betraying the NHS. He must drop this Bill."

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