About 80% of Bureau Veritas' (BV) computing systems are back online two weeks after a cyber-attack on the French classification society which led it to take servers and data offline.

BV, one of the biggest class societies for shipping, detected an attack on its computing networks on Saturday 20 November and activated its cybersecurity procedures.

Chief executive Didier Michaud-Daniel told BV's 2021 investor day at the end of last week that it faced a presumed ransomware attack on part of its network.