In the early hours of June 14, 2017, residents of Grenfell Tower were caught off guard by a deadly fire that would turn the building into an international symbol of negligence and injustice. What started as a small kitchen fire in the 24-story residential building in North Kensington, London, quickly spread uncontrollably through the exterior, ultimately resulting in the deaths of 72 people.
The tragedy is revisited in the documentary Grenfell: Uncovered, which premieres on Netflix on June 20. The film gives voice to victims, reveals behind-the-scenes details of the investigation, and exposes how corporate interests and government failures contributed to the disaster. But what exactly happened that night—and what followed?
How did the Grenfell Tower fire start?
The fire originated in Flat 16, on the fourth floor. The resident, Behailu Kebede, was awakened by the smoke alarm and saw flames near the fridge and freezer, which had caught on fire. He immediately called the fire brigade at 12:54 a.m., and the first crews arrived at the building five minutes later.
The first firefighters entered the flat at around 1:07 a.m. They conducted a quick sweep but didn’t reach the kitchen until seven minutes later. According to a firefighter’s account, there was a “curtain of fire” rising to the ceiling. Thermal images captured by the team suggest that gases and flames were already escaping through the kitchen window, which was located by the fridge. From 1:09 a.m. onwards, the fire began to break through to the outside of the building—marking the start of a devastating spread.
Within 30 minutes of the firefighters’ arrival, the fire had climbed up the east side of the tower and reached the top floor. By 4:30 a.m., the entire building was ablaze, and more than 100 flats had been affected.
Why did the fire spread so quickly?
Several structural and design flaws contributed to the rapid and catastrophic spread of the flames. The most critical factor was the exterior cladding installed during a 2016 refurbishment. Grenfell Tower had been covered with aluminum composite panels (ACMs) that contained a polyethylene core—a highly flammable plastic that releases enormous amounts of heat when burned, essentially acting as fuel for the fire.
Additionally, the thermal insulation installed beneath the cladding — made of polyurethane foam — was also combustible and helped the fire spread, as did other construction materials. Renovations to the windows included the use of flammable materials, which allowed the fire to pass from one floor to another through gaps in the structures.
Experts featured in Grenfell: Uncovered highlight that the ACM cladding—made of aluminum composite material with a polyethylene core—had already been flagged in previous fire tests as dangerous, with rapid burn, intense heat, and heavy smoke release. These test results were kept secret by companies like Arconic, the manufacturer of the material used in Grenfell Tower.
The failure of the emergency plan
Like many residential buildings in the UK, Grenfell Tower followed a fire safety policy known as “stay put”—the idea that in the event of a fire, residents should remain in their flats, trusting that the building’s design would prevent the flames from spreading.
But this plan failed catastrophically that night. By 1:26 a.m., less than 30 minutes after the fire brigade arrived, it was clear the situation was out of control. In desperation, some people climbed to neighbors’ flats on higher floors, others jumped from the building, and many ignored the official advice and fled down the stairs in search of safety.
Even so, an evacuation order was only issued at 2:47 a.m. Richard Millett QC, the lead counsel to the Grenfell Tower Inquiry, stated in a hearing on June 4, 2018, that 144 people had evacuated the building before 1:38 a.m. After that point—when the “stay put” advice was finally abandoned—only 36 more people managed to escape.
The role of the government in the tragedy
While corporate negligence was a key factor in the fire, government oversight—or lack thereof—also played a central role. The cladding material used in Grenfell Tower had already been banned in countries like the United States due to its flammability. Yet, in the UK, it remained legal, largely due to years of deregulating the construction industry.
Policies implemented encouraged the loosening of safety standards in favor of cost-cutting and efficiency measures, creating a regulatory vacuum in which unsafe materials could be approved and used.
Furthermore, internal documents later revealed that the local authorities responsible for Grenfell—the Royal Borough of Kensington and Chelsea (RBKC) and the Kensington & Chelsea Tenant Management Organisation (KCTMO)—were aware of the potential risks. Cost-cutting decisions during the tower’s refurbishment led them to choose the cheaper, more dangerous cladding, instead of safer alternatives like zinc.
Residents had long raised safety concerns. Six months before the fire, a local tenant group had warned about fire risks in an open letter. Their pleas were ignored. The fire at Lakanal House in 2009, which killed six people and also involved flammable cladding, should have served as a wake-up call. But once again, authorities failed to act.
The investigation and the pursuit of justice
After the fire, an extensive public investigation was launched. The Grenfell Tower Inquiry, established to determine causes, was divided into two phases. The first began in September 2017 and concluded in October 2019, focusing on the events of the night itself through witness testimony. The second phase, which began in January 2020, examined broader structural issues—including decisions made during the building’s refurbishment and the involvement of companies that supplied flammable materials.
Following years of extensive hearings, the final report was published on September 4, 2024. It attributed the disaster to failures by the government, the construction industry, and especially the companies responsible for installing flammable cladding on the building’s exterior. The report found that the cladding did not meet fire safety regulations and was the primary reason for the rapid spread of the fire. It also criticized the London Fire Brigade’s delayed shift from “stay put” advice to a full evacuation order, which significantly compromised rescue efforts. A total of 58 recommendations were made, including updates to building regulations.
With the official inquiry concluded, it is now up to the police to identify potential criminal cases and refer them to the Crown Prosecution Service (CPS), which will decide whether to bring formal charges. Due to the complexity of the material gathered, authorities have stated that any criminal charges are unlikely to be filed before the end of 2026.
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