More than 100 schools and colleges in England have been told to partially or fully close buildings because of fears over concrete which could suddenly collapse.
Ministers are facing pressure to 'come clean' about the scale of the autoclaved aerated concrete issue - it comes as more than 100 schools or colleges have been hit with full or partial closure
Thousands of children were unable to return to lessons after the summer holidays over concerns reinforced autoclaved aerated concrete could disintegrate and collapse
Reinforced autoclaved aerated concrete is a lightweight, cheaper, alternative to normal concrete, but has a fixed lifespan and many buildings built with it now desperately need repairing and rebuilding