@ Jetex Jim (Post 75)
When Martin started their Canberra/B57 programme, the reason that a "sample" Canberra had to be used to "get the drawings and things" right was that English Electric naturally worked to British Standards (BS) right down to the sheet metal thicknesses, nuts, bolts and such while, again naturally, Martin worked to US Standards. Conversion to US Standards was therefore a normal part of the task and nothing for which to reproach EE, or British industry.
Getting a canopy on it from which the view was better than "limited" (but within the state of the art when Mr. Petter designed the aircraft) was another matter, and the British attempt, on the B.8, may have given the pilot better vision, but left the Nav in an "unenviable" situation - but it was a cheaper solution, it was said, pending the always imminent arrival of TSR2 the Wonder Horse.
Incidentally, until much later, Ford worked to US standards in the US, and to Metric in its UK and German factories. When the company decided to build its first "world car" (long before the Mondeo) which would be built in all its worldwide factories, the company decided to change its US factories to Metric standards