Concrete Catastrophe what is RAAC and why are schools closing?

Department of Education tells schools to close to protect children from potentially dangerous concrete structures. RAAC has been identified in over 100 schools across the UK and with the sudden and catastrophic collapse of a RAAC beam over the summer the Government has issued a safety warning forcing some schools to fully close and others to partially close, resulting in students resorting back to remote learning in a manner similar to the pandemic.