AyrTC is right, Buzz. The service provided by Moray on W5D is a RAS - hence the name "Advisory Route". Off route, it's a RIS, while a FIS only seems to be given to off route VFR a/c or helis (correct me if I'm wrong Moray guys).
Moray seem all too happy to let us bored Scumburgh folk play outside 40 miles if we ask nicely. The W5D standing agreement says the transfer point to Slumburgh radar is at or outside 40 miles. The only tiny little gripe I would have is this is not usually complied with - but that is not a big issue.
The gap between Aberdeen 40 and the point where PB radar can work (we do have our limits) IS covered by a sector at ISZ, but that sector is called Helis, and so I would guess it is there to provide services to..... Helicopters (with the occasional low level fixed wing thrown in). The training backlog on that sector is big enough at the moment without throwing fixed wings in as well.
Methinks I here a loud BUZZing noise coming my way.