More than a thousand doors similar to those believed to have failed to stop the spread of the fire in the Grenfell Tower tragedy are still being used across Sutton, it has emerged.

Figures released by Sutton Council show 1,335 doors have been fitted in social housing it manages with Sutton Housing Partnership (SHP) around the borough.

But now a major £3.5 million project to replace all glass-reinforced plastic (GRP) composite fire doors is underway after it was discovered some failed to meet standards when specific tests were carried out.

Following the fatal Grenfell Tower blaze which killed 72 people in June 2017, a public inquiry found underperforming Manse Mastador products contributed to the catastrophe.

A Freedom of Information (FOI) request sent to the council by HuffPost UK discovered 35 Masterdor Ltd doors are being used in Sutton – the same type which previously failed a 30-minute fire resistance test.

And there were also problems discovered with doors from Bowater by Birtley and Solar Windows Ltd.

There are 1,300 Bowater doors in Sutton social housing, according to the FOI, and a number of ones from Solar Windows which are yet to be confirmed – bringing the total to at least 1,335.

In Sutton Council’s FOI response it said SHP is still waiting on further guidance from the Ministry of Housing, Communities and Local Government (MHCLG).

This is following “failures of some doors to meet standards when certain tests had been carried out”.

The 35 Masterdor doors, alongside the Solar Windows ones, are being replaced in an ongoing fire door replacement programme – some of which happened before MHCLG’s announcement.

Jayne McCoy, Sutton Council’s deputy leader, said following the Grenfell disaster SHP instructed architects and engineers to inspect the council’s two high-rise blocks.

Investigations confirmed the cladding was safe, alongside “a range of improvement works” which are either completed, underway, or due to commence shortly – including a sprinkler system at Balaam House.

She added: “The council and SHP have worked closely with the London Fire Brigade, and have followed their advice regarding improvements to fire doors and ensuring that communal areas are kept clear.

“SHP work continuously with residents to ensure communal areas are free of combustible items, and to increase awareness of fire safety in the home.

“Since information about the compliance of GRP fire doors was published by MHCLG last autumn, SHP has committed to replacing all GRP doors installed in the homes it manages on behalf of the council.

“This will be done through a risk based approach, taking into account the overall risk presented to residents.

"The replacement of this many doors is expected to cost in the region of £3.5 million and will need to be phased over up to four years.

“The council made this decision as part of our commitment to improving safety beyond the legally required minimum.”