As the long-awaited final report into Grenfell Tower is made public, we look at the cladding that has been at the centre of the story for seven years.

We ask Richard Hull, an expert in chemistry and fire science who’s been following the story, why it was used in the first place and what made it so dangerous.

Also this week, the neuroscience of the Oasis queue, the technology powering Paralympic athletes and strange sounds from space...

Presenter: Victoria Gill Producers: Sophie Ormiston, Ella Hubber & Gerry Holt Editor: Martin Smith Studio Manager: Emily Preston Production Co-ordinator: Andrew Rhys Lewis