The director overseeing main contractor Rydon’s work on the Grenfell Tower refurbishment has admitted to being “haunted” by the lack of scrutiny the ill-fated project’s cladding and window designs were subjected to.

Stephen Blake, who was Rydon’s refurbishment director on the project – and who also filled in as contracts manager in its final months – said that in hindsight key elements of the tower block’s refurbishment had been presumed to be correct when they were not.