Exterior of the British Library on 15th January 2024 in London, United Kingdom. The British Library, a research library, is the national library of the UK, and is one of the largest libraries in the world. The library was recently subjected to a massive cyber attack, and is currently trying to restore its main catalogue, a process which is likely to take a year. Ransomware group Rhysida has claimed responsibility for the attack which took place on 31st October 2023.