Just had a quick rummage through my box of old timetables and found Aer Lingus, Summer 1986. Dublin to Guernsey Sundays from 1 June to 30 September. No aircraft listed but "Commuter Service" shown in italics. The Aer Lingus F50s didn't enter service until early 1989 so no doubt operated by S360. Flight time shown as 1 hr 55 mins!! No sign of this service in any other year around that time.