The two MPs who revealed the accident and emergency and maternity units at Kingston Hospital were under threat have called on the NHS to come clean on the potential closures.

Susan Kramer, MP for Richmond Park, and Edward Davey, MP for Kingston and Surbiton, last week revealed the units at the Galsworthy Road hospital were at risk of shutting.

They said they had met with high-ranking NHS bosses and been told there was a plan to close A&E and maternity units in south-west London and the closure of the units at Kingston was on a shortlist of two options.

Gavin Marsh, a clinical director of healthcare for south-west London, denied any hospitals were to close, but would not give assurances about specific departments.

A pre-emptive campaign was launched to try and stop the closures.

The NHS has confirmed a review of departments in the area is under way but repeatedly stated no decisions have been made.

More than 6,000 people have now signed a petition on the MPs website – savekingston hospital.org.uk – opposing the closure and more than 12,000 members of social networking site Facebook have joined a group called Save Kingston Hospital.

Ms Kramer and Mr Davey have called for documents about the closure to be published and have submitted 34 separate Freedom of Information requests to six organisations within the NHS.

They have specifically asked for the publication of a document entitled the South West London Strategic Plan, which Mr Davey said contained 18 wide-ranging options for closing hospital services in the area. They hope to debate it in Parliament on Monday.

Ms Kramer said: “Since we blew the whistle and warned of the threat to Kingston Hospital, NHS bosses have carefully avoided denying our central claim and concern that they are actively studying the closure of Kingston’s A&E and maternity units.

“But for this to be a proper conversation in which the public can have its full say, they must now put the detail of their review into the public arena.

“We have requested a large number of documents but most are instantly available to the NHS and could be made public immediately.

“If London NHS fails to do so they will put the Health Minister in an impossible position in the Commons next week.”