The aircraft
To return to the subject
I spent several years flying the Searchwater radar during the development phase. We had a Viscount at Radar Research Squadron RAE Bedford
For any research project you must describe the state of the preceeding aircraft and the expected benefit from replacement. Only when you describe the expected benefit to the country of obtaining the new equipment can you arrive at some idea of the bargain to be gained by buying. You will have to assess the cost of aquisition and the long term operating costs, then discover if there are any other ways of meeting the military need. It may be that there are other, less obvious, functions the equipment can perform or it may be that the public function is actually a peace time use to train and occupy the force with a completely different purpose in crisis. This means you will need to assess what other situations, the Falklands perhaps, might justify aquiring the euipment as insurance rather the obvious topical need.
As part of the cost benefit of cancelling the project you would have to measure the amount already paid or contracted, the remaining bill and the potential foreign sales of aircraft or electronics. There may be strategic benefits of making our own kit rather than depending on "friends" in time of crisis. They may find it expedient to cease being our friends
You have a long and demanding research project ahead of you. As usual you will find very difficult to say anything of value in 5000 words
Best of luck