As far as I know it's standard radar vectoring.
So an inbound could be transferred,say, 30 miles out and the tower controller does the vectoring?? Not sure this would get through a safety case. What happens at Belfast where the trial has already taken place? How could the tower controller handle a stack should there be bad weather or inbound delays?
Ultimately if it comes in it's the airport operator who takes the risk on the airfield closing should there be sickness.
Hello Zooker