Further to AH AAM option.
A5 seeker contract to GEC is 1959 RRE trials using AI.18 modified with CW injection. Flight trials for monostatic (on the rail) on a Canberra started March '62.
Bistatic (post launch) trials August '62. Some 25 flights and so much information gathered they had to slow doen to let analysis catchup.
Original contract investigation terminated 1963 replaced by ship launched guided weapons.
This then in 1963 is the moment when a decision could be taken to drive the seeker towards a new AAM.
A new radar.
The new AI radar effort carried on despite 1957 and soon dropped the sophisticated development of Orange Cocktail like twin dish FMCW and focused on FMCW via a single dish. Likely this for the OR.346 Fighter and then AW.406
Having P1154 foisted on the RN, the effort continued past the microphony problem of single dish FMCW (1962) and the FMICW effort (flew on Canberra early '64) resolved into EARS and Ferranti X/Q dual band AI set for P.1154B. Treasury funded second phase work from mid 1963.
Work continued past P.1154B cancellation in '64 in favour of F4 and AFVG came to the rescue as a platform.
EARS/Ferranti x-band only effort continued past AFVG as only AI radar effort in the UK, much work on performance over various surfaces and targets. Terminated August '67.
Recommissioned to serve as development tool in 1971 for the new digital FMICW AI set, which we know became AI.24 Foxhunter.
RRE had chosen best elements of MEASL and Ferranti proposals to combine together.....
