Timing of move was last minute, so couldn't plan ahead.
New property has a BT line (previous occupant was with BT) so used online process to switch services. This correctly identified that there was a line in place and an engineer wasn't require. It also said that this would take around 4 days.
Later in the process however I was forced to book an engineer appointment for 17 Jan, some four WEEKS later, with an activation date of the new line on the same day.
The engineer appointment has been cancelled by BT (as not required), but no one seems able to bring the date forward. I've had two very painful chat sessions with India (one of which I was rudely cut off on as I was being referred to a manager - presumably as it was 9 o clock and they were closing, but I was given no explanation).