Parkfell - you clearly have no idea of air traffic control, aviation in general or the type of operation which currently prevails at Stornoway.
Not only schedule airline services but regular charter traffic, all of whom operate IFR but they are all entitled to a full ATC service.
The HIAL airfields which operate FISO only are those which only ever have one IFR movement at any one time, these are the same airfields which company procedures for the airline which are approved by the CAA, which is why, under these specified circumstances.
At other airports which normally have full ATC during the day, FISOs operate after ATC closes, but for emergencies only.
Duel validations are dangerous - as has been clearly demonstarted in the past when an ATCO with such an endorsement mistakenly cleared an aircraft for a procedure, which although valid at his own airfield, put a scheduled aircraft operaing IFR through an active danger area at the other.
You're not a HIAL Senior Manager are you?
