In 1974 Air Anglia added a pair of Fokker F-27 Friendship turboprops to its fleet. The introduction of these turboprops into the airline's fleet coincided with the launch of the company's first year-round scheduled services from its Norwich base to Aberdeen via Humberside and Teesside as well as from Norwich to Amsterdam. The scheduled services between Norwich, Humberside, Teesside and Aberdeen allowed Air Anglia to commercially exploit the regular positioning flights it had been operating between these points since its inception. Oil and gas industry related business travellers constituted a high proportion of this traffic. The launch of Air Anglia's first international scheduled service to Amsterdam also led to the conclusion of a joint marketing agreement with Dutch flag carrier KLM, at the time the biggest resident operator and dominant scheduled airline at Amsterdam's Schiphol Airport. Under this agreement KLM agreed to host Air Anglia's new Norwich—Amsterdam scheduled service, as well as any subsequently launched scheduled services linking regional UK airports not served by the KLM group with Amsterdam Schiphol, in its reservations computer. This gave travel agents worldwide instant access to Air Anglia's connecting flights to/from Amsterdam via KLM's Global Distribution System, thereby enabling Air Anglia to improve its passenger loads on these services as well as helping KLM to boost its long-haul loads by delivering it additional transfer traffic from the UK regions to its Schiphol base.