A secret meeting has been held by ministers and Labour Party officials to work out ways of closing hospitals without jeopardising key marginal seats, The Times can reveal.

Concerns about the political impact of planned hospital closures and other cuts to the NHS, which had a deficit last year of more than £500 million, prompted ministers to organise the closed-door discussion. Details of the meeting, revealed in e-mails passed to The Times, show that it included Hazel Blears, the Labour chairman, political advisers from No 10 and even — at the request of Ms Blears — a Labour Party representative.

Opposition politicians said yesterday it was "deeply inappropriate" that party officials should have had an influence over plans drawn up by civil servants for changes in services on medical grounds. They also expressed concerns that hospitals in Tory constituencies were more vulnerable.

Reacting to the Times story, Rosie Winterton, the Health Minister, this morning denied that Ms Blears had any influence on the planning of health "reconfigurations".

Ms Winterton told BBC Radio 4's Today programme: "First of all, let’s be clear that Hazel Blears, as chairman of the party, within Cabinet, will want to know about what is happening in terms of the politics of some of this, will want to know what is happening.

"It isn’t about Hazel Blears having any influence over the decisions that are taken. That would be quite wrong and that doesn’t happen."

The e-mails show that Patricia Hewitt, the Health Secretary, called for those at the meeting to be provided with "heat maps", showing marginal Labour seats where closures or reconfigurations of health services could cost votes. She also asked for lists showing hospitals where the European Working Time Directive is likely to hit hardest, making 24-hour rotas hard to sustain.

Ministers have always insisted that the directive will not affect hospitals, but the e-mails suggest otherwise. Ms Hewitt may have been seeking to blunt the impact of the loss of 24-hour care by reconfiguring services to conceal it.

David Nicholson, the new NHS Chief Executive, gave warning this week that closures and reconfigurations were imminent. He expected there would be about 60 such changes, affecting every strategic health authority (SHA) and focusing particularly on maternity and accident and emergency services.

The leaked e-mails make it plain that such changes have been considered since at least May. The first, from Alison Smith, a Department of Health official, refers to a May 12 submission about "supply-side reconfiguration".

The second, from Ms Hewitt’s private secretary, says that the Health Secretary asked for a political meeting to discuss the submission. She wants the health ministers Lord Warner and Andy Burnham to attend with their advisers, Ms Blears and her two advisers, and John McTernan and Paul Corrigan from No 10.

A further e-mail from Ms Hewitt’s diary secretary says that Ms Blears has asked for a party representative to be included. The meeting took place on July 3 at the Department of Health.

Andrew Lansley, the Tory health spokesman, said: "There is a secret political debate going on to try to minimise damage to the Labour Party."

A spokesman for Ms Blears confirmed that the meeting had taken place but said that because it was political there was no record of who was present. "It wouldn’t be unusual for Labour Party press officers to attend meetings with ministers," he said. "And as Minister without Portfolio, Ms Blears has the responsibility of providing policy advice to the Prime Minister across all departments, so she had a second reason for being there."

Ministers are worried that the changes planned by Mr Nicholson may have the same effect as the removal of an A&E unit from Kidderminster Hospital in 2001, which led to the Independent candidate Richard Taylor ousting the Labour MP.

After Mr Nicholson’s interview appeared, the Department of Health said his remarks did not mean "wholesale closures of hospitals" but rather that the NHS needed to work with local communities to decide how best to organise services.

One of the first strategic health authorities to make a move is the East of England SHA, whose board met yesterday to discuss a review of acute services. There are 19 district general hospitals in the region and reports suggest that as many as nine will be downgraded.

Mr Lansley said it was no coincidence that the hospital top of the list for changes, and the only one specifically targeted in the board papers, for yesterday’s meeting, was Hinchingbrooke — "which happens to be in one of the two safest Conservative seats in the country".

DANGER LISTS

East of England Strategic Health Authority says some of its 19 hospitals may be too small to provide comprehensive services. Hinchingbrooke in Huntington tops the list for changes or closure, but no guarantees have been given for any hospital in Cambridgeshire, Norfolk, Suffolk, Bedfordshire, Essex or Hertfordshire

Many A&E departments are under threat. Those reportedly at risk include Chase Farm in Enfield, Penzance, Northwick Park in Harrow, and Central Middlesex

Maternity services may be lost at Fairfield Hospital in Bury, Rochdale Infirmary, Alexandra Hospital in Redditch, and Stroud Maternity Hospital. Community hospitals also face a doubtful future

Times Recommends

• Anne Darwin's performance of a lifetime
• Renaissance for canals as new boaters come aboard
• Case study: forced to marry a cousin at 17