“The British built the amazing Spitfire and excellent Hawker Hurricane fighter planes. What happened?”
Socialism happened.
They also built the infamous Reliant Robin. The three wheel vehicle with the single wheel...on the front. And they wondered why it had a habit of tipping over. :-)
If only they had done some research....

The Germans also made a tiny three-wheeled car - I saw one at a museum. Although I think it had two wheels in the front and one in the back. The car looked like a feather could topple it over.