The insulation panels used as part of Grenfell Tower’s flawed refurbishment were being marketed as suitable for use on high rise buildings despite failing a fire test needed to prove they were safe, the inquiry into the June 2017 fire has heard.

The RS5000 panels, manufactured by insulation firm Celotex, didn’t pass a key fire test six months before their launch in August 2014, inquiry barrister Richard Millett QC told the inquiry.