@ Tailsar (Post 37?)
When BAC Weybridge proposed the 3-11 to oppose the A300 from Airbus, Hawker Siddeley, who had been in the project from very early days, were already well into the design of the A300 wing and fully integrated into the programme. HSA's financing was sais to be "private venture risk-taking", though I believe there was German money involved, for Hatfield's reputation for excellent wing design was widely recognised, and one of the reasons for Boeing's interest in the Trident's early days. Airbus needed HSA's wing,while BAC had decided to keep well away from the unproven Airbus idea.
The 3-11, I believe, got rather short shrift when UK government money was asked for. Given that Airbus had already published its ideas for future developments of the A300 - right through from what became the A310 to the A330/A340 - the 3-11 must have seemed a lonely "stand-alone" project, while there was some real evidence of "family planning" on the Airbus side, both French AND German.