Lead investigator Detective Chief Superintendent Fiona McCormack said: “Specialist experts – BRE – are working on a flat by flat assessment of every safety feature so we can provide individual accounts to families, the public inquiry and my investigation.

“This is so we can be clear on the state of each flat and any specific fire safety features as well as every part of the building.

“We are continuing to seize material on a daily basis and the number of companies and organisations that we know so far to have played a role in the refurbishment alone is over 60.

“It is a priority for the Met Police.

“Our investigation will be exhaustive – it must provide the answers that so many people are seeking and so desperately deserve.”