I'm not really sure what your response is saying.
My view is, the villains are the airlines for stating their particular requirements, the UK aviation industry doing their best to comply with them, and then the airlines saying they didn't want the aeroplanes designed to their specifications.
I don't know about some of the blame at BOAC with the VC10 and BEA with the Trident, as far as I'm concerned it's entirely because of their idiotic decisions.
Accepting, obviously, that the UK international market is a minnow compared to even the US internal market, I quite understand that the UK manufacturers tried to chase the domestic market. The trouble was it appears the big cheeses at at the national airlines hadn't got a brain cell between them. I know they're an easy target but I suspect what I once heard described as the "dead hands of accountants..."