Sir ND, yes, it was. I was with Loganair and based in Lerwick. Loganair had the Scottish air ambulance contract. Unlike Orkney & Glasgow with dedicated ambo BN2s, Shetland's plane had a dual role. Normally pax/freight flights during the day - but always prioritised for any ambulance flights that would pop up, and on call at night for ambo work. Many of the outer island strips only got electric runway lights during the period I was there. It certainly was interesting flying into somewhere like Out Skerries at night using gooseneck flares on their 381m runway.