The chairman of an expert panel assembled to help the Government in the wake of the Grenfell Tower disaster had previously advised against the retrospective fitting of sprinklers in high-rise buildings.

An independent panel will convene to suggest immediate safety action in the wake of the inferno which claimed the lives of at least 79 people earlier this month.

It will be chaired by former London fire commissioner Sir Ken Knight, who compiled a report on the Lakanal House fire in Camberwell which killed three women and three children in 2009.

Fires in high-rise blocks of flats in England graphic(PA graphic)

In his report to the Department for Communities and Local Government, he wrote: “It is not considered as practical or economically viable to make a requirement for the retrospective fitting of fire suppression systems to all current high-rise residential buildings.

“However it is a matter for individual housing owners and landlords to decide if automatic fire suppression is required as part of their fire safety strategy based on their fire risk assessment.”

Sprinklers, as well as cladding, are expected to be among the details analysed by a public inquiry into the fire.

Prime Minister Theresa May has called for a “major national investigation” into the decades-long use of potentially flammable cladding on high-rise towers across the country in the wake of the fire.

Fatalities and non-fatal casualties from fires in high-rise blocks of flats in England graphic(PA graphic)

Mrs May said “something has clearly gone wrong” with the use of potentially flammable cladding on high-rise towers across the country.

“What we have seen from the investigations that have taken place of cladding material in tower blocks across the country is that 100% of these materials being combustible,” the Prime Minister said.

“Something clearly has gone wrong over a number of years and we need to find out what, why and how to make sure it doesn’t happen again.”

The latest tally of fire safety checks was presented to the Cabinet by Communities Secretary Sajid Javid – but a fire safety expert raised doubts over the combustibility tests being carried out on cladding samples by the Building Research Establishment (BRE).

The number of fires in high-rise blocks of flats in London from 2009/10 to 2016/17 graphic(PA graphic)

David Metcalfe, head of the Centre for Window and Cladding Technology, a body which works with hundreds of contractors, architects and manufacturers, claimed samples are being tested “severely” in a way which may be inflating the scale of the crisis.

The appointment of an expert panel was announced on Tuesday and will “advise on any immediate measures that can be put in place to make buildings safe”.

It will be made up of building and fire safety experts, including the chief executive of the Building Research Establishment, Peter Bonfield, chairman of the National Fire Chiefs Council, Roy Wilsher, and president of the Royal Institution of Chartered Surveyors Amanda Clack

They are due to have their first meeting during the course of this week.