newmercman:
Britain did not win the war, the Allied Forces won the war, even then Hitler gave them a big helping hand by deciding to take on RussiaTo give credit to Germany it did manage rather well against the rest of the World when it came to the war. All the military equipment they used in that war was made in Germany, whereas the Allies had factories all over the world producing theirs, so to say the Germans were pretty good at making stuff would be quite reasonable
The ‘allied forces’ weren’t actually in the war in 1939-40 and at that time the Russians were actually on the side of the Germans.Which just leaves the question what if the Battle of Britain and the Battle of the Atlantic had been lost and Germany had invaded Britain in 1940 and even if not ‘if’ the D Day invasion had failed and the allies were thrown back into the channel.In either case the issue of what the Russians were doing would have been irrelevant because we’d have either had Hitler in charge or Stalin.All of which would have been a real possibility if it hadn’t have been for British Naval and air superiority and you wouldn’t have had that superiority without having superior engineering. 
As for VALKRIE’s comments I’ll let this and the comments by those who recognise the contribution which Britain’s engineers have made have the last say in that regard.