Melchett1,
Having used 1ACC services on Fast Mover & our Opeval at St Mawgan last year, I think they will provide a great deal more than basic ATC for the CAS guys out there along with the rotary & multi guys.
They may not offer the level of service that the E3 FCs however, they do provide a very good back up & I'm sure the Harrier mates out there will appreciate them being in town as will the ground Cdrs.