Buildings at three NHS trusts in England have failed fire safety tests in the wake of the Grenfell Tower disaster, health officials have said.

All NHS trusts and foundation trusts have been asked to carry out urgent fire safety checks following the tragedy.

This in addition to cladding from 190 high-rise buildings which has failed combustibility tests rolled out by the Government.

NHS Improvement said it has identified 38 organisations that required support to carry out urgent checks to ascertain if they had cladding similar to that used on the tower.

All of these organisations have started 24-hour fire warden patrols, it said.

Of the 38 organisations, samples of cladding taken from three providers have failed combustibility tests.

A further five organisations are still awaiting test results.

Grenfell Tower

Nineteen have had a review and no further action is needed at this stage, and a further 11 are not required to take further action at this time "as the building material sampled is not aluminium composite material (ACM) cladding", NHS Improvement said.

Sheffield Children's NHS Foundation Trust is taking steps to remove cladding from one of its buildings following a negative test result.

The affected area - the top two storeys of the Stephenson Wing - is not used for inpatient accommodation.

Cladding from the main building at North Middlesex University Hospitals NHS Trust - which includes the main outpatient, day surgery, link corridors and office facilities - has also failed the test and is being removed. No inpatients stay in the main building.

King's College Hospital NHS Foundation Trust in south London announced on Monday that cladding at one of its buildings was being taken down following tests. It is also a building not used by patients.

In a statement, Sheffield Children's NHS Foundation Trust said: "After sending samples of the cladding on our Stephenson Wing for fire safety testing, we have identified material that we will be removing. We are investigating ways to do this as soon as possible.

"Staff who work in this area are also receiving enhanced fire safety training, and we are working closely with South Yorkshire Fire and Rescue to make sure everything is in place to protect the safety of our patients and staff.

"All fire alarms are fully updated and evacuation procedures in line with best practice.

"We can assure families that the hospital remains a safe place to visit."

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North Middlesex University Hospital NHS Trust said in a statement: "We want to reassure, patients, staff and visitors that our main ward areas do not have cladding on their exterior walls and as a result are not affected.

"However, cladding on the main building which includes the main outpatient, day surgery, link corridors and office facilities failed the fire resistance test.

"The parties responsible for the ongoing maintenance of the building and who have been working with us on this matter have been informed of the test result.

"The Trust will work with them over the coming weeks to examine the appropriate actions necessary to address this issue.

"The Trust is confident that it has taken all the appropriate steps to ensure the safety of its patients, staff and other visitors to the Hospital."

Yesterday, King's College Hospital NHS Foundation Trust said it removed cladding as a precaution at its Denmark Hill site in south London.

It said in a statement: "Following an independent review by specialist fire engineers at Arup, one small non-patient area at Denmark Hill was identified as having potentially flammable cladding.

"The safety of our patients and staff is paramount and therefore, as a precautionary measure, we immediately removed this cladding in its entirety.

"The affected area is not used by patients and there was no disruption to services while the cladding was removed."

NHS Improvement refused to disclose the names of all 38 trusts receiving support.