Andy Burnham has accused the Conservatives of a "double deceit" when it comes to election campaigning and the NHS.
Labour's health spokesman told Good Morning Britain: "They are committed to very extreme spending cuts and they're not saying to people that they're going to cut social care after the coming election, and that will drag down the NHS.
"Secondly they haven't said where a penny of their extra funding will come from.
"Labour is the only party with a plan to put more money into the NHS this year and next".
Labour are to launch a week of intensive campaigning focused on the NHS, claiming the service is on "life support" and accusing David Cameron of posing a risk to its "very fabric and foundation".
The party is also accusing some members of the party of supporting further charges or privatisation within the service.
The future of the straining health service has become one of the key battlegrounds of the General Election, with Conservatives and Liberal Democrats pledging to find the £8 billion health chiefs say is needed by 2020 to prevent it buckling.
Labour has refused to commit to the same amount, but says it will do "what is necessary" and says its promised £2.5 billion increase in funding is the only fully-funded proposal put forward so far.
A new Labour poster will claim that "the NHS is on life support. Don't let the Tories pull the plug", and Miliband will directly accuse the Conservatives of a "double deceit" in a speech later today.
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A major incident doctor who normally responds disasters involving multiple casualties was sent in to help out a stretched accident and emergency unit as patients waited hours for treatment.
The medical incident officer was drafted in to Worcestershire Royal Hospital on Friday as staff were forced to treat patients in the corridor due to high demand.
The move came after West Midlands Ambulance Service demanded action over delays in treatment, which it said was preventing emergency vehicles from getting back on the road.
The hospital trust said the situation was "less than ideal".
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