Today l moved my landline from analogue to the didgital via my hub. Landline is dead. Do Virgin have to do something to activate the line?
If your telephone service is/was via a wall socket, it will stay that way until VM switch you as part of their planned programme of work or a VM tech visits to do it manually (often as an alternative to fixing a fault on the old line).
If you have moved the connection to the hub because VM has advised today is your switchover day, then the usual advice is to leave the phone plugged into the wall socket until the wall socket no longer works, then try the phone connection on the back of the VM hub.