On 30 April 1946, the second prototype, which was also the first 34-seat Wayfarer, registered "G-AGVB", made its first flight. It quickly commenced proving flights in the colours of Channel Islands Airways, where it carried in excess of 10,000 passengers over six months. The third aircraft, registered "G-AGVC," was the first Freighter I and had fully operational nose doors. After a number of demonstration flights around the world, the Bristol 170 entered full production. One of the first sales was to the Argentine Air Force, which ordered 15 aircraft.