Demolition contractor Squibb has dismantled the steelwork and is clearing up the site of the catastrophic collapse last Tuesday.

The wreckage is being taken to two separate places to allow Health and Safety Executive and insurance investigators to establish why the steel frame failed.

Main contractor Ashe Construction and steelwork contractor Norfolk based DGT Structures are helping investigators sift through key elements of the steel frame for the £6.1m City Gates Christian Centre.

Andrew Morris, business development director for Ashe Construction, said: “We had the guy who erected the building down there marking up steel so that marked up steel is of particular interest and will be taken to Squibb Construction’s yard.

“Nothing will be discarded until such time as a number of insurance companies have looked at it. It’s not just our insurers but those of the steelwork fabricators and others.

“All the parties involved have a potential for liability for the collapse until a cause is established, which could take quite some time.”