Sorry for the delay in reply .. Colchester ..
Whole weekend (and Monday) without Broadband (I rebooted 5 or 6 times to see if I could spark it into life without luck). Booked Tuesday morning off work ready for the engineer.
Monday evening at 6pm broadband booted up by itself. I can only assume someone had found an unreported fault and fixed it ...
Cancelled the engineer, but now wondering when it will next drop out for 3 days