More than seven years after the Grenfell Tower catastrophe, a much-awaited report investigating the 72 individuals who perished in the fire is about to be released.

The final report of the investigation into the 2017 accident is a lengthy document that is likely to outline the conclusions drawn about the conduct of government, the London Fire Brigade, local authorities, and corporate construction companies.

Families of those killed have insisted it must be a “landmark report” which prompts widescale change after what was described as a “spider’s web of blame” was spun during inquiry hearings.

A report in 2019, from the first phase of the inquiry, concluded the tower’s cladding did not comply with building regulations and was the “principal” reason for the rapid and “profoundly shocking” spread of the blaze.

This final report, which follows further hearings on the tower’s 2016 refurbishment, will present conclusions on how the west London block of flats came to be in a condition which allowed the flames to spread so quickly.

The report comes just over a week after a major fire in east London at a block which had been undergoing work to have cladding removed as a result of what happened at Grenfell.

The non-fatal Dagenham blaze, coming so many years after the 2017 fire, prompted fierce criticism from various quarters including bereaved and survivors group Grenfell United, which said it showed the “painfully slow progress of remediation across the country, and a lack of urgency for building safety as a whole”.

Dame Judith Hackitt, who led an independent review into building regulations after the Grenfell fire, described it as “really concerning” that so many people are still living in uncertainty and fear about the safety of their homes.

Number 10 said Prime Minister Sir Keir Starmer had, at Tuesday’s Cabinet, said the Dagenham fire was a further reminder of the importance of learning lessons from Grenfell to ensure mistakes made then never happen again.

The Fire Brigades Union has said the Grenfell fire “was a crime caused by deregulation and institutional failings at the highest level”.

The final hearing of the second phase of the inquiry took place in November 2022, with families having previously spoken of their long wait and continued fight for justice.

The report’s findings could ramp up pressure on police and prosecutors to make speedier progress on getting people before the courts – something many bereaved and survivors have said must happen for justice to be served.

In May, the Metropolitan Police said their investigators need until the end of 2025 to finalise their inquiry, and prosecutors will then need a year to decide whether charges can be brought.

Bereaved and survivors have described that wait, which could stretch to a decade after the catastrophic fire, as “unbearable”.

According to the update from police and prosecutors earlier this year, the mammoth police investigation into the fire has already generated 27,000 lines of inquiry and more than 12,000 witness statements.

A total of 58 individuals and 19 companies and organisations are under investigation for potential criminal offences, and more than 300 hours of interviews have taken place.

Potential offences under consideration include corporate manslaughter, gross negligence manslaughter, perverting the course of justice, misconduct in public office, health and safety offences, fraud and offences under the fire safety and building regulations.