David Cameron has insisted he is "committed" to the Government's health reforms following what he described as "constructive and helpful" talks with healthcare bodies.

His words followed a turbulent morning for the Government, with the Health Secretary facing an angry protester, and fresh tensions emerging over the reforms. Speaking after a summit in Downing Street, the Prime Minister said: "We had a constructive and helpful meeting, and what's clear is there are quite a few myths that we need to bust about this reform.

"So I'm committed to these changes, committed to taking them through, but we need to do everything we can to explain to people this is about improving and enhancing our NHS, not in any way endangering it."

But the summit itself was mired in controversy after it emerged that opponents of the controversial bill are not attending the meeting. The list of those invited, revealed this afternoon, is: The Royal College of Surgeons, the Royal College of Physicians, National Voices, the NHS Alliance, the Royal College of Paediatrics and Child Health, the Royal College of Anaesthetists, NHS Bassetlaw, the NHS Confederation, ACEVO, Baywide Torbay Clinical Commissioning Group, the Foundation Trust Network, the National Association of Primary Care and the Royal College of Obstetricians and Gynaecologists. Other Royal Colleges, including the Royal College of GPs, were not invited. Labour accused the Prime Minister of closing the door of Number 10 to critics.

Health Secretary Andrew Lansley was also confronted by an angry protester as he walked to the summit. Protester June Hautot, who is a member of the South West London Keep the NHS Public campaign and a former Unison rep, confronted the Health Secretary.

Mr Lansley also faced fresh signs of dissent over the controversial reforms from within the Coalition as a Liberal Democrat ministerial aide broke ranks to call for ministers to reveal the true risks of the new legislation.

Duncan Hames, who is Parliamentary Private Secretary to Energy Secretary Ed Davey, signed an early day motion calling for the publication of a "risk register", which outlines the costs and risks of the Health and Social Care Bill. He signed the motion along with 12 other Liberal Democrat MPs.

Mr Hames told PoliticsHome: "At the time that I first asked the Government about the risk register – nearly three months ago, at Health Questions – the Health Minister stated that they were still considering how to move forward in the timescale the Information Commissioner had given them. I encouraged him to publish the risk register in the knowledge that such documents would normally contain carefully-thought through mitigation strategies that rather than alarm, may actually serve to reassure the public."

The Government has so far refused to reveal the risks in spite of a ruling by the Information Commissioner, but the motion says: "This House expects the Government to respect the ruling by the Information Commissioner and to publish the risk register associated with the Health and Social Care Bill reforms in advance of Report Stage in the House of Lords in order to ensure that it informs that debate."

In total, 75 MPs have signed the motion, which was tabled by Liberal Democrat Andrew George. Today Mr George released a statement saying the Health Bill had "no friends", and that "dignified withdrawal would be best".

David Cameron has been accused of playing "divide and rule" over his decision not to invite major health professional bodies to a Downing Street meeting about NHS reforms.

The Prime Minister will tomorrow host a meeting with senior professionals on the Health and Social Care Bill, but the British Medical Association and the Royal College of Nursing - two of the most vocal critics of the Bill - say they have not been invited.

Shadow Health Secretary Andy Burnham said the NHS means too much for the Government to "play divide and rule" over the reforms.

"People have strong and sincerely-held views about the risks to the NHS from the Government's re-organisation. They deserve a hearing, not to have the door of Downing Street shut in their faces," Mr Burnham said.

According to the Mail on Sunday, the Prime Minister is planning to remove Health Secretary Andrew Lansley from his position in the autumn, with Jeremy Hunt in line as a replacement.

The Prime Minister's difficulties on health have also been laid bare, with a ComRes poll for the Independent on Sunday showing only a third of voters think Mr Cameron is a sincere supporter of the NHS.

Liberal Democrat disquiet over the health bill will come to the fore next month when members table an emergency resolution at their spring conference. The motion calls for the removal from the legislation of a whole chapter on competition in the NHS.

David Cameron will meet with health practitioners next week to discuss how best to implement the Government's controversial health reforms.

The Downing Street round table, which is likely to include Health Secretary Andrew Lansley, will attempt to save the NHS Bill and set forward a path for implementing the reforms.

Critics of the Bill have hit out at the decision not to invite them, with the head of the British Medical Association warning that GPs are being "set up to fail" by the Conservatives as part of a "hidden agenda" that could lead to the privatisation of the NHS.

In an interview with The Times, Dr Hamish Meldrum accused the Government of concealing the "true intentions" of the reforms.

Ed Miliband also attacked the Prime Minister, warning the progress would not be reached "by shutting the door of Downing Street on doctors, nurses and patients' groups".

Over 2,800 women have been referred to the NHS for treatment having received PIP breast implants. Figures released by the Department of Health show that 2,860 women have been referred by their GP because the clinics that carried out the original procedures had failed or closed.

David Cameron has committed himself to pushing through the controversial Health and Social Care Bill.

Responding to accusation from Ed Miliband that he has broken his promises on the NHS and that he should drop the Bill the Prime Minister has called a summit with health professionals on Monday in order to press ahead with its implementation.

On a visit to the Royal Bolton Hospital, Mr Miliband said: "He has broken all these promises and more. It is bad for our NHS and bad for politics. He should drop his NHS bill and at least restore one of his broken promises."

A letter in the Lancet medical journal condemning the Bill has also piled pressure on the Government, with Shadow Health Secretary Andy Burnham saying warnings do "not come more serious than this".

A repeat of the PIP breast implant scandal would be "impossible to prevent", Britain's chief medical devices regulator has warned.

Professor Sir Kent Woods said the regulatory system could not be used to prevent fraud and needed only "incrementral improvements".

The Department of Health have today revealed that a total of 2860 women have been referred to the NHS over fears about the safety of PIP, and a small number of procedures to remove the implants have already been carried out.

Doctors have expressed "serious concerns" about the rollout of the new 111 NHS phoneline in the UK.

The free number is set to be launched in April 2013, but the British Medical Association has warned that it may put strain on existing services, and has written to the Health Secretary asking for the deadline to be relaxed.

Dr Richard Vautrey, the BMA spokesman, told BBC News that in some parts of the country the NHS is "literally in chaos" and does not have the organisational ability to the implement changes.

He said there was "so much change going on" that the health service would be unable to safely introduce the new phoneline. "We need some time," he said. "This can be a good idea, but we need to get it right."