Correct Oly - only being picky for the purists you understand. We've had "Guernsey" before - but twas the International that time.
Sorry I pinched your idea Ducky.
As Duckbutt already knows -
French flying boat base in Guernsey St Peter Port harbour mid 1917 – early 1919.
Tellier 200 and possibly FBA flying boat (type unspecified) up to a dozen, due to the very successful submarine war being waged by Germany against allied shipping principally in this case, in Channel and UK coastal waters. View looking north. LFH
Oly has control.