Grenfell Tower and
UK fire safety reform
The fire that changed UK building safety regulation — what happened, what the inquiry found, and what has changed as a result.
On 14 June 2017, a fire at Grenfell Tower in North Kensington, London, claimed the lives of 72 people. It was the deadliest structural fire in the United Kingdom since the Second World War. The fire, and the public inquiry that followed, exposed profound failures in building safety regulation, construction oversight, product testing, and the management of high-rise residential buildings. Its consequences for UK fire safety law and practice continue to unfold.
The fire
Grenfell Tower was a 24-storey residential block managed by the Royal Borough of Kensington and Chelsea’s Tenant Management Organisation. The fire started in a fourth-floor flat in the early hours of 14 June 2017 and spread rapidly up the exterior of the building via the cladding system that had been installed during a refurbishment completed in 2016.
The cladding system — which included aluminium composite material (ACM) panels with a highly combustible polyethylene core — acted as a conduit for fire to travel vertically and horizontally across the building’s facade at a speed that no one inside could have anticipated. Within minutes of the fire breaking out from the flat of origin, the exterior of the tower was alight. The fire reached the top of the building in approximately 30 minutes.
The standard advice given to residents of high-rise buildings at the time was to stay in their flats and wait for the fire service — a policy known as “stay put.” This advice is based on the principle that a well-constructed high-rise with compartmentalised fire-resistant floors and walls should prevent a fire from spreading beyond its point of origin, protecting residents in their flats better than evacuation through smoke-filled corridors and stairwells. At Grenfell, the cladding system meant that the building did not behave as that principle assumed. Many residents who followed the stay put advice died in their flats. Those who evacuated early survived.
The inquiry
The Grenfell Tower Inquiry
A public inquiry chaired by Sir Martin Moore-Bick was established shortly after the fire. It reported in two phases — Phase 1 in October 2019, examining the events of the night itself, and Phase 2 in September 2024, examining the broader circumstances that led to the fire and the systemic failures it exposed.
Phase 1 — the night of the fire
Phase 1 examined how the fire started and spread, the actions of the London Fire Brigade, and the decisions made during the emergency response. It found that the principal reason the fire spread so rapidly was the external cladding system, and made a number of recommendations about evacuation procedures and fire service communications in high-rise buildings.
Phase 2 — how it came to happen
Phase 2 examined in detail how a building came to have such dangerous cladding, and the broader failures that allowed it. The inquiry’s findings were damning across multiple fronts — identifying serious failures by the building’s management, the local authority, central government, construction product manufacturers, the construction industry, fire safety professionals, and the regulatory framework itself. The report identified that the cladding and insulation used on the building were both combustible and that testing regimes had been manipulated and misrepresented by manufacturers. It also found failures in the way building regulations guidance was written, interpreted, and enforced.
Read the inquiry reports
The full Phase 1 and Phase 2 reports are available on the official Grenfell Tower Inquiry website, along with all evidence heard during the inquiry.
Grenfell Tower Inquiry websiteThe legislative response
What changed — the regulatory reforms
Grenfell triggered the most significant reform of building and fire safety regulation in the UK in decades. The key legislative changes are set out below.
| Legislation | What it introduced |
|---|---|
| Fire Safety Act 2021 | Clarified the scope of the Regulatory Reform (Fire Safety) Order 2005 to explicitly include the structure, external walls (including cladding), and flat entrance doors of multi-occupied residential buildings. Removed ambiguity that had previously allowed some building owners to argue these elements were outside the scope of their fire safety duties |
| Fire Safety (England) Regulations 2022 | Introduced new requirements for high-rise residential buildings — including mandatory sharing of building information with the Fire and Rescue Service, regular checks of fire doors and evacuation lifts, monthly checks of fire alarm and warning systems in common areas, and the display of fire safety instructions for residents |
| Building Safety Act 2022 | The most wide-ranging building safety legislation in a generation. Established the Building Safety Regulator, created a new regulatory regime for higher-risk buildings (those over 18 metres or seven storeys with two or more residential units), introduced the concept of the Accountable Person and the Principal Accountable Person, and significantly extended the timeframes within which claims can be brought for defective buildings |
Higher-risk buildings
The new regime for high-rise residential buildings
Under the Building Safety Act 2022, buildings that are over 18 metres in height or have seven or more storeys and contain at least two residential units are designated as higher-risk buildings and are subject to a significantly more stringent regulatory regime than standard commercial premises.
The key obligations introduced for higher-risk buildings include mandatory registration with the Building Safety Regulator, the appointment of an Accountable Person responsible for managing building safety risks, the preparation and maintenance of a Safety Case Report demonstrating how building safety risks are being managed, engagement with residents on building safety matters, and the maintenance of a Golden Thread of building information — a digital record of the building’s design, construction, and ongoing safety management.
What this means for fire alarms in high-rise residential buildings
The Fire Safety (England) Regulations 2022 introduced specific fire alarm requirements for high-rise residential buildings that go beyond the standard BS 5839-1 maintenance schedule. These include monthly checks of the common area fire alarm and warning system, quarterly checks of flat entrance fire doors, and annual checks of all fire doors in the building. Building owners and managing agents responsible for high-rise residential blocks should ensure they are familiar with these additional obligations and that their maintenance contracts reflect them.
Cladding remediation
The ongoing remediation programme
One of the most significant and costly consequences of Grenfell has been the identification of unsafe cladding on thousands of residential buildings across the UK — not only ACM panels of the type used at Grenfell but other forms of combustible cladding and insulation that do not meet current safety standards.
The remediation programme — replacing unsafe cladding on affected buildings — has been a major undertaking involving central government funding, developer contributions, and, in many cases, protracted disputes about who bears the cost. As of the time of writing, significant numbers of buildings remain in the remediation process. Many residents in affected buildings have lived for years with waking watch arrangements — overnight fire wardens — and interim fire alarm upgrades as temporary measures pending permanent remediation.
The government maintains a building safety programme with up-to-date information on the remediation process. Leaseholders and residents in affected buildings can find guidance on their rights and the remediation process on the GOV.UK building safety pages.
GOV.UK building safety resources
The government’s building safety programme pages cover the regulatory framework, remediation funding, leaseholder protections, and guidance for building owners and residents.
Building safety programme — GOV.UKThe broader lessons
What Grenfell means for fire safety practice
Beyond the specific legislative reforms, Grenfell has had a profound effect on how fire safety is approached across the industry. Several themes have emerged that are relevant to anyone responsible for fire safety in a building.
The limits of stay put
The stay put policy remains valid in properly compartmentalised buildings where the structure performs as intended. But Grenfell demonstrated that it cannot be applied as a default without understanding the specific fire safety performance of the building. The duty to have a suitable evacuation strategy — and to review it when circumstances change — falls squarely on the Responsible Person.
Competence matters
The inquiry identified failures by fire safety professionals who signed off on arrangements that were not adequate. Competence — genuine, assessed competence rather than simply holding a certificate — is a recurring theme in the post-Grenfell landscape. The Building Safety Act introduced new requirements around the competence of those involved in the design, construction, and management of higher-risk buildings.
Residents must be informed
One of the most persistent criticisms to emerge from Grenfell was the failure of those responsible for the building to listen to residents’ concerns and keep them informed. The new regulatory framework places explicit obligations on building owners to engage with residents and share information about building safety — a fundamental shift from the previous culture in parts of the housing management sector.
Product integrity cannot be assumed
The inquiry found that some construction product manufacturers had manipulated fire test data and misrepresented the performance of their products. This has led to a fundamental review of how construction products are tested and certified in the UK, and a much greater degree of scepticism about product safety claims that are not supported by transparent, independently verified testing.
The Grenfell Tower fire was a tragedy of enormous scale, and the grief of those who lost family members, friends, and neighbours on that night remains very much present. The reforms that have followed are significant — but they are also a reminder that regulation alone cannot substitute for the culture of care, competence, and accountability that fire safety ultimately depends on. That culture starts with people in roles like the Responsible Person taking their obligations seriously, asking the right questions, and not assuming that compliance on paper means safety in practice.
Further reading
Related guides on this site
The following guides cover topics directly relevant to the regulatory changes introduced following Grenfell:
Fire alarm legal requirements for UK businesses
Covers the RRO 2005 as amended by the Fire Safety Act 2021, the Responsible Person’s duties, and the enforcement framework.
Who is legally responsible for fire alarm testing?
Understanding the Responsible Person role, delegation, and personal accountability — including the changes introduced by the Building Safety Act.