Can anybody advise the most time-efficient way to get up and running on the assumption that the current owner cancels their contract with BT as they move out?
For starters, make sure they know NOT to take the ONT with them, only the router.
I think OR really messed up by not fixing the ONT to the wall securely, so that its clearer it should not be removed. (because apparently people can't read the darn notice on the ONT itself)