Dont know the rules either but here is what I would do:
Mobile. 118 118, "Kirkwall airport or tower please, aye and put me right thru at your robber rates thanks". "Hi Kirkwall Tower G-xxxx here with knackered radio 5 miles to the SW be with ya in 5 minutes"
Simples !
Edit: On the back side of my home made laminated checklist transposed from the POH that hangs on the yoke clamp I got all the Scottish frequencies along with the telephone ATIS, Met office weather number and tower telephone numbers for all the fields in the region I fly
Last edited by piperboy84; 24th Dec 2013 at 13:09.