United Kingdom, July 16 -- Students at St Leonard's Catholic School have returned to a brand-new permanent campus delivered by BAM after almost three years away, following the successful completion of one of the UK's most significant Reinforced Autoclaved Aerated Concrete (RAAC) school rebuilds.In 2023, the school was forced to close after surveys identified it as one of the worst RAAC-affected schools in the country. More than 100 schools across England have been impacted by the discovery of RAAC, a lightweight construction material widely used between the 1950s and 1990s that is now known to deteriorate over time, posing a potential structural risk if left unaddressed.For the 1,400 pupils and staff at St Leonard's, the closure meant an ur...