[3] Services were taken over by a new company, Northern & Scottish Airways who operated a De Havilland Dragon aircraft three times per week from Glasgow.

[5] In 1940, during the Second World War, the Prime Minister, Winston Churchill, ordered military airfields to be constructed in the western islands of Scotland, both to defend against a German assault on the Scottish mainland and also to provide reconnaissance planes a base to fly missions over the Atlantic Ocean.

[11] On 28 September 1957, de Havilland Heron 1B G-AOFY, while operating a flight for the Scottish Air Ambulance Service, crashed on approach to Islay, in bad weather.

Calderwood, radio officer Hugh McGinlay, and Sister Jane Kennedy from Glasgow's Southern General Hospital were killed.

[12] One of the remaining two Herons was named Sister Jean Kennedy after the nurse; the other after James Young Simpson, a Scottish pioneer in anaesthetics.