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Former staff from Kingspan, the manufacturer of an insulation product used on Grenfell Tower gave evidence this week.

Technical Project Lead Ivor Meredith, admitted he was involved in a deliberate calculated deceit carried out by the company – aimed at achieving the best possible sales for its insulation products.

Only a month ago Kingspan withdrew three large scale fire test reports after accepting the product tested did not represent what they were selling.

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