One of the subcontractors responsible for fitting the external cladding system to Grenfell Tower has agreed that some of the fire protection measures that formed part of the package were fitted in a way that was “shocking” and “unacceptable”.

Mark Osborne, of Osborne Berry, made his observations to the Grenfell Tower Inquiry, probing the causes of 2017’s fire in which 72 lives were lost, on Monday.