Housebuilders may be “gaming the system” to avoid fire safety rules put in place after the Grenfell Tower tragedy, a fire chief has warned.

Paul Jennings, deputy commissioner of the London Fire Brigade, said there are “hundreds if not thousands” of new buildings examined by fire safety engineers which may be “deliberately” designed to avoid stringent fire safety rules put in place after the Grenfell Tower fire in 2017.

They include those designed to be lower than an 18-metre limit to be considered a high-rise building, which would require more advanced fire safety measures.

He told the BBC’s Newsnight: “We have got examples where we think people are deliberately designing and building their buildings below that 18 metre, six floor threshold because they know if they reach that threshold they would have to put advanced and more intricate fire safety measures in.”

The deputy commissioner described these new buildings in the UK capital as examples where there “may be gaming the system”.

He warned: “We are potentially extending the legacy issues that we are already currently discovering that are in London and in the cities across the country.”

When asked how many new buildings in London were being constructed to avoid the rules, he said it was likely “hundreds and if not thousands”.

“We are seeing around 60% of the building consultations that come into the fire engineering team and others are ones where we are going backwards,” added Mr Jennings.

The London Fire Brigade’s warning comes after the Housing Secretary, Michael Gove, made his first appearance in front of a committee of MPs who asked questions about building safety.

On Monday, Mr Gove told the Housing, Communities and Local Government Committee: “We collectively – the department, some in local government, others in the private sector – failed people at Grenfell and there are people who were and still are in buildings where there is a significant risk.”

He went on to say that, as the Grenfell Inquiry turned its attention to the Government’s role in the disaster, his department “will be seen to have, on a couple of occasions, not necessarily appreciated the importance of fire safety”.

Regional cabinet meeting – Bristol
Communities Secretary Michael Gove.

Asked about who should pay for the work required to make the affected buildings safe, Mr Gove confirmed that he would “pause” plans that would see leaseholders take out loans to pay for remediation work.

Some leaseholders have reportedly been hit with bills for more than £100,000 to replace unsafe cladding or pay for so-called “waking watches” where someone is employed to patrol a building checking for fires.

The Housebuilders Federation, which represents housing developers, told Newsnight: “Developers meet the building regulations set by Government without exception.

“Standards today are considerably more exacting than previous iterations. Building regulations differ dependent on the type of building, but all have residents safety at their core.”

The Government said: “The safety and wellbeing of residents is our priority and the Building Safety Bill will strengthen oversight and protections for everyone in high rise buildings.

“All new buildings of any height must meet building regulations fire safety requirements and we have already banned the use of all combustible materials on external walls of new residential buildings over 18 metres.”