A familiar story? "Ofcom said the emergency call handling outage was caused by an error in a file on a BT server, which meant systems restarted as soon as call handlers received a call." "An attempt to recover from the problem then failed, Ofcom said, due to a human error because instructions on how to solve such an issue were "poorly documented" and staff were unfamiliar with the process" BBC News - BT fined millions for failing to connect 999 calls - BBC News https://www.bbc.co.uk/news/articles/cjr4zkq1kkwo