How about the
P.149 of 1969 for the RAF, that was a further development of the P.145 with a number of avionic modules including a Ferranti Inertial nav system for search, terrain following, ranging and ground mapping. An alternative to the Rocket assisted take off was a RB.162 engine fitted in the tail, the airbrakes being opened 20 degrees during operation.

P.157 A close air support version, with a stretched foreward fuselage to allow the fitment of a twin gunpack, tandem twin wheel main undercarriage units an APU and a braking parachute. This version would have had blown flaps and ailerons giving a 35% reduction in ground roll. In service date was to be 1981/2.

Richard