The social housing regulator has written to landlords warning them to be on top of the risks posed by a potentially dangerous form of lightweight concrete in historic homes.

The RSH said in the missive, sent to all affordable housing landlord bosses, that councils and housing associations needed to find out if their homes contain Reinforced Autoclaved Aerated Concrete, known as RAAC, and, if so, assess what risks this posed to tenants.

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