The Machrihanish MATZ is some distance north, and would require a call to cross. A clearance to do so would be VFR. Matzs are not Controlled Airspace. In my experience, Maccrihanish ATC was very hard to contact low level in the mull area due to terrain blocking, but would not be an issue. Crossing this very quiet MATZ would not have been a problem, or necessarily given any thought prior to turning along the coast.