Buildings at London’s King’s College Hospital, North Middlesex Trust and Sheffield’s children’s hospital have been found to have combustible cladding.

NHS Improvement also revealed five hospital trusts are still awaiting combustibility test results from the Building Research Establishment of the first 38 priority hospitals to be checked after initial surveys.

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

Of these trusts checked so far, 30 have started fire warden patrols but did not need further action at this stage, NHS Improvement said.

A test sample taken from an office building at King’s College Hospital in south London failed an ACM fire safety test. The trust has already removed the cladding as a precautionary measure.

The other two sites have failed on buildings that house patients, but do not keep them in overnight.

Sheffield Children’s hospital is taking steps to remove cladding from one of its buildings following a negative ACM test result.

Samples from a building at North Middlesex University Hospitals NHS Trust have also failed the ACM combustibility test.