Investigation under way to find out if parliamentary estate has any Raac

Authorities unsure whether the aerated concrete at risk of collapse is present anywhere on the estate

Investigations are under way into whether the Houses of Parliament have any reinforced autoclaved aerated concrete (Raac), the material at risk of collapse that has led to the closure of more than 100 schools.

Maintenance teams are trying to establish whether the dangerous concrete is present in any parts of the parliamentary estate, Bloomberg reported. A source told the Guardian that parliamentary authorities are unsure whether Raac is present and are trying to find out.