An expert witness is a person who is called to give an opinion on matters which call for expert skill and knowledge. Their role is to provide technical analysis and expertise, which will assist the Inquiry in delivering its Terms of Reference.

Appointment of expert witnesses

The Inquiry has instructed a range of experts (as seen below) to prepare reports and is actively considering the requirement for additional or supplemental expertise as the evidential picture develops.  

Core participants can also instruct their own experts but require the Chairman’s permission to submit a report to the Inquiry. Since it is the job of the Inquiry to carry out any necessary investigation, permission will be granted only in exceptional circumstances. If public funding to instruct an expert is sought, an application must be made to the Chairman.

Expectations of expert witnesses

  • They must provide independent opinions confined to matters within their field;
  • owe the Inquiry a duty to exercise reasonable care and skill;  
  • must comply with any relevant professional code of ethics;
  • should take into account all relevant facts including any which might detract from their opinions and they should set out relevant facts and any literature or material upon which they rely;
  • should indicate whether any opinion they express is provisional or qualified and whether any additional information is required; and
  • should inform the Inquiry if they change their opinion on any relevant matter.

Expert reports

The reports all experts prepare will be disclosed to all core participants, published on the Inquiry website and presented during the evidential hearings.  They will form part of the evidential record and will be used to write the Phase 1 and 2 reports. You can find each experts’ report under their heading below.

Prof. Anna A. Stec  

Prof. Anna A. Stec is reporting on the fire derived toxicants and related deposits present in the Tower and their origins, in terms of construction products, furniture and furnishings; and where combustible building products were present on the tower exterior (including ACM and insulation) and window surrounds, and the extent (if any) to which their combustion products penetrated and left identifiable deposits inside the Tower, in individual flats, lobbies and the stairs.

Dr. Barbara Lane  

Dr. Barbara Lane is reporting on the fire protection measures within the building and preliminary conclusions on the extent to which they failed to control the spread of fire and smoke and contributed to the speed at which the fire spread.

Dr Lane's report.

Beryl Menzies  

Beryl Menzies is reporting on the application for building control approval in relation to the refurbishment of Grenfell Tower and whether the steps taken by all the relevant parties complied with the relevant legislation, regulations and guidance. 

Colin Todd  

Colin Todd is reporting on the different statutory and regulatory requirements in force over the lifetime of Grenfell Tower and the adequacy of fire risk assessments in the case of Grenfell Tower including those carried out pursuant to the Regulatory Reform (Fire Safety) Order 2005.

Prof. David Purser  

Prof. David Purser is reporting on the production of toxic gases in fires similar to that at Grenfell Tower and the consequences of inhaling toxic gases in such circumstances; the likely causes of incapacitation and death at Grenfell Tower; and the toxicity when exposed to fire of certain materials which were present at the time of the fire.

Prof. Purser's report.

Prof. Edwin Galea  

Prof. Edwin Galea is reporting on the fire spread over the external façade of the building, fire and smoke spread throughout the building, fatality modelling and evacuation modelling.

Dr. Ivan Stoianov  

Dr. Ivan Stoianov is reporting on the sufficiency of water supply and water pressure to Grenfell Tower for the purpose of providing water to allow the London Fire Brigade to effectively fight the fire on 14 June 2017.

Dr. J. Duncan Glover  

Dr. J. Duncan Glover is reporting on the assessment of the electrical fire origin in Flat 16 within the area of fire origin established by other investigators.

Dr Glover's report

Prof. Jose Torero  

Prof. Jose Torero is reporting on the fire spread throughout the building.

Prof Torero's report.

Prof. Luke Bisby  

Prof. Luke Bisby is reporting on the ignition of the façade materials (including the cladding and insulation) and the fire spread over the building’s external façade.

Prof Bisby's report and video annexes.

Prof. Niamh Nic Daeid  

Prof. Niamh Nic Daeid is reporting on the cause and spread of the fire in the flat of origin and the spread of fire within and out of that compartment.

Prof Nic Daeid's report.

Paul Hyett  

Paul Hyett is reporting on the architectural design in relation to the refurbishment of Grenfell Tower, including: the choice of materials; the development of the design; compliance with legislation and regulations; and the quality of the workmanship.

Rodney Hancox  

Rodney Hancox is reporting on the legislation, regulations, guidance and industry practice relevant to the gas supply to and within Grenfell Tower and the extent to which the presence of gas contributed to the spread of the fire and to the conditions inside Grenfell Tower on the night of 14 June 2017.

Steve McGuirk  

Steve McGuirk is reporting on the adequacy of the London Fire Brigade's inspections, risk assessments, procedures and training, the fire-fighting response on the night of 14 June 2017 and recommendations for any changes to training and practice in response to similar incidents.

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