Welsh housing association Trivallis advised 40 households to move out of their homes earlier this week due to risks posed by Reinforced Autoclaved Aerated Concrete (RAAC).

Following surveys, Trivallis discovered a “critical risk” related to RAAC in one of its homes, and has said that this issue could potentially affect 40 other homes with a similar design.

The lightweight concrete, which is at risk of sudden collapse, was found in the roof and ceilings.