When he hadn't arrived by 5.30pm I phoned Sky to double check. The woman said she couldn't see that an engineer had been assigned to the job but she'd check and get back to me. She did and said that Openreach had discovered that there was a fault in the exchange affecting all in our area code with fibre broadband (some of our neighbours were off too we found out last night) so the engineer had been cancelled.
Nice of them to let me know

Anyway, it came back on in the early hours so all is well with the world now
