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How manufacturers sold combustible cladding

When Marcio Gomes found out that Grenfell Tower, where he lived, was going to be covered in cladding, he assumed it must be safe. Today we know this material was the main cause of the spread of the fire at Grenfell Tower.

The cladding installed on the tower was made by French company, Arconic - it was highly combustible. Prior to the fire at Grenfell, Arconic staff were warned that covering a tower block in this material could add the fuel power of an oil tanker to the outside walls. Why did they sell it anyway? And how was that allowed?

Presenter: Kate Lamble
Producer: Josephine Casserly
Production coordinator: Janet Staples
Audio engineers: James Beard and Gareth Jones
Story consultant: Simon Maybin
Editor: Penny Murphy