VEGA ECM And of course, in the case of the JP1 the Ministry was just too “skinflint” to redesign the Pericival Piston Provost Landing Gear, until it was proven that it absolutely necessary!
No, Hunting Percival designed the Jet Provost. The use of Provost legs was to use a high commonality with the earlier aircraft ( about 80% by memory) in order for the company to gain the contract. By the time they had got to the JP4 I think it was down to about 20%. I’ll leave it to others to comment on the rest of your dissertation 🙂