10/31/2008. Remarks by Johan Visschedijk: "Auster Aircraft produced a large number of aircraft for the British AAC, including 379 of the Model K AOP.6, and 83 of the Model Q T.Mk.7. Auster had started to develop the Model 6A civil version of these military types, when on September 7, 1960 the company became Beagle-Auster (Beagle = British Executive and General Aviation Ltd., Auster was dropped from the company name in 1962).

Beagle redesignated the Model 6A to A.61, and 82 of the AOP.6 and T.Mk.7 were converted into:

17   A.61 Tugmaster glider tugs,
18   A.61 Terrier 1, featuring electrical starter, civil trim, new exhaust and arear bench seat
46   A.61 Terrier 2, Terrier 1 with flaps, larger tail, differential ailerons, new landing gear
  1   A.61 Terrier 3, fitted with an 160 hp Lycoming O-320-B2B.

G-ATDN was original an AOP.6, s/n TW641 c/n 2499, converted to A.61 in 1965 and is still registered as of this day."