The prototype registered G-ARRM (designated the B.206X) first flew from Shoreham Airport, West Sussex on 15 August 1961.

[1] The prototype aircraft was a five-seat all metal low-wing monoplane powered by two Continental flat-six engines.

[6] When the company needed the room at Rearsby to build the Beagle Pup, production of the B.206 ended with the 79th aircraft, (c/n B.080).

[7] A competition was held at RAF Northolt in March 1963 between the B.206 and the de Havilland Devon for an aircraft to replace the Avro Anson, with the specification designed around the requirement to fly a five-man V-bomber crew, wearing full flying gear, and a ground crew member, from Britain to Malta.

Beagle redesigned the aircraft to the larger B.206Y to meet this requirement, with the expectation of an initial order of at least 80 from the RAF.

[9] It was powered by two Rolls-Royce/Continental GIO-470 six cylinder horizontally-opposed engines giving it a maximum speed of 220 mph and a range of 1,645 miles.

The type was sold to and operated by civilian firms and individuals in several countries including Australia, Brazil and the United States.