More than 100 buildings have failed the latest fire safety tests set up in the wake of the Grenfell Tower fire, the government has said.
Tests examined the safety of cladding in combination with a polyethylene filler and stone insulation.
Of the 111 buildings to fail the test, 90 are local authority or housing association-owned.
Rockwool, the makers of the insulation, said the test does not properly assess their product.
They say it is non-combustible and has the highest grade for fire resistance worldwide.
The Local Government Association said the 16 councils that own the affected blocks were already taking safety steps.
The test is the second of six ordered by the government and takes the total number of buildings that do not comply with current building regulations to 193.
Last week, it was revealed that the combination of materials used on the facades of 82 towers had failed the first of the six cladding combinations being …