Will you still be providing the temporary airways clearance for Class G departures wishing to transfer to London Control (or its Scottish equivalent)?
OTOH, presumably, if flight in CAS is banned, IFR flights will need to leave UK airspace under VFR, on a Z flight plan.
I thought one had to "book out" with London Info on the way out of the UK, VFR. Presumably they won't want the call.