named John Hunter while G-ANXB, the first aircraft to be delivered on 12 February 1955, was named Sir James Young Simpson). Scheduled operations commenced on 18 April 1955, following which one aircraft was exclusively used on scheduled services while the other was kept on stand-by for air ambulance duties. An expansion of BEA's scheduled activities within the Scottish mainland as well as between the mainland and the Outer Hebrides, Orkneys and Shetlands necessitated the acquisition of a third aircraft to provide adequate cover for the air ambulance service. This resulted in an order for a third Heron 1B, which was delivered on 13 April 1956. This aircraft (G-AOFY, Sir Charles Bell) crashed on 28 September 1957 while on an air ambulance service to Port Ellen/Glenegedale Airport, Islay, Inner Hebrides, with the loss of the pilot, radio officer and duty nurse on board. From 1962, BEA supplemented the Herons it used on its Scottish internal services with three new, 48-seater Handley Page Dart Herald 100 series turboprops. These had originally been ordered in 1959 through the Ministry of Supply, which leased them to the airline. BEA operated its first commercial Herald service on 16 April 1962 on the Northern Isles route from Glasgow to Sumburgh via Wick, Aberdeen and Kirkwall. However, BEA operated its Heralds, which wore the red, black and white livery, only for a few years because of high crew training, maintenance and spares costs. 1962 was also the year BEA introduced Viscounts on its Scottish network. These took over the routes to Benbecula and Stornoway in the Outer Hebrides from 21 May, only two days after BEA's last-ever Pionair service from Islay via Campbeltown to Renfrew. From October 1966, BEA operated only Viscounts and Herons on its Scottish network. It used the former on the busier, longer routes while it utilised the latter on short feeder routes to/from restricted airfields serving remote communities as well as on the air ambulance service. To improve the financial prospects of its loss-making Scottish lifeline routes, BEA established Scottish Airways Division in 1971. Glasgow-headquartered Scottish Airways became financially accountable for BEA's Scottish internal routes. It also assumed financial responsibility for the airline's services from Glasgow to Belfast, as well as from Aberdeen and Inverness to Heathrow. While it was initially operationally responsible for its entire network as well as the Scottish Air Ambulance Service, operational responsibility for the Aberdeen–Heathrow route passed to