Former staff from the insulation manufacturer Celotex admitted that they behaved unethically dishonestly and lied for commercial gain during their work to get a product approved for use on buildings over 18 metres in height.

They admitted they adding a non-combustible material called magnesium oxide to ensure their cladding system passed a fire test and then hid details of that test from certification bodies, customers and even their own staff.

Producer / Presenter: Kate Lamble Producer: Sharon Hemans Researcher: May Cameron