Yes the British civil service has a long history of ignoring British engineers and just doing whatever the Americans tell them. A key example is Black Arrow. Or the TSR-2. Exactly the same with the PC. Imagine how it could have been...
Thank you for posting that doc. My Dad worked on TSR-2 avionics (at Ferranti) and I grew up entertained by tales of TFR and moving map displays. Interesting reading.