Interest in the Bulldog began when a replacement was required for the venerable Chipmunk, then the standard elementary trainer. In 1972, orders were placed for the Series 120 Bulldog, which been modified by strengthening the airframe to produce a fully aerobatic aircraft, and fitting a standard full RAF instrument panel. Known as the Bulldog T1, the new version first flew on 30 January 1973, and was first delivered to the Central Flying School, then at Little Rissington, in April. The Bulldog is now operated by the University Air Squadrons (UAS) and Air Experience Flights (AEF)

Powerplant: One Lycoming 360-A1B6 of 200hp.

Span: 33ft (10.06m)

Length: 23ft 2.5in (7.09m)

Max Speed: 150mph (240km/h) at sea level

Accommodation: Two, side by side

Recognition: Single-engined low-wing monoplane. Fixed tricycle undercarriage. Short nose. Large glazed area to cabin with two windows each side. Tapered wings with square tips. Large fin and rudder and ventral strake under fin. Oblong tailplane with square tips set at base of fin.

• UASs (University Air Squadrons), various - 85 Bulldog T1
• No 3 FTS, RAF Cranwell - 11 Bulldog T1