GY postcode area
The GY postcode area , also known as Guernsey postcode area , its post town , is a group of 10 consecutive postal districts covering Guernsey , Alderney , Sark , Herm and the two inhabited lesser islets in that region of the Channel Islands . 
<triplet> Guernsey <subj> Channel Islands <obj> part of <triplet> Alderney <subj> Channel Islands <obj> part of <triplet> Sark <subj> Channel Islands <obj> part of <triplet> Herm <subj> Channel Islands <obj> part of <triplet> Channel Islands <subj> Guernsey <obj> has part <subj> Alderney <obj> has part <subj> Sark <obj> has part <subj> Herm <obj> has part