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Expert witness Professor David Purser believes people are more likely to have died from smoke inhalation than from exposure to heat and flames.

During a presentation to the inquiry Professor Purser explained how irritants and gases in the smoke would have affected residents and impeded their escape.

Producers Elisabeth Mahy and Kate Lamble\\nResearcher Olivia Beazley\\nContact us via email: grenfellpodcast@bbc.co.uk