By Adam Postans and Amanda Cameron Castle School in Thornbury The full extent of a “disruptive and distressing” ransomware attack that has affected 24 schools in South Gloucestershire can now be revealed. More than 1,000 devices are having to be rebuilt and many teachers could start the new term today without laptops, whiteboards and other vital equipment and resources. Live lessons have had to be cancelled and parents’ evenings postponed. South Gloucestershire Council says 16 servers have now been rebuilt, back office systems are in place and services are being restored, giving every school “core functionality and access to management information”, with some schools affected worse than others.