Yep, The Auster AOP 9 was the last in the line of Air Observation Post Austers, operated by the (British) Army Air Corps, and was a 'spotter' and light communications aircraft.
It derived from the earlier AOP6, which in turn was a militarised version of earlier aircraft, built by British Taylorcraft Auster, under licence from Taylorcraft of the USA. Beagle Aircraft carried on civilian production, with 'Austers' being known as Beagle Terriers, and the civilian version of the AOP 9 becoming the Husky.