Brits gave us: Radar, Sonar, Code-breaking insights, the Merlin Engine, the Whittle Jet Engine and far more.
The US contributed: The Manhattan project, massive license production (Packard-Merlin), gobs of shipping, the 8th Air Force (Daylight Bombing), etc and so forth.
Exactly correct. There was a massive amount of American British technology Exchange during the war. As usual, penetrating the barrier the US Navy is a little more formidable, but marginally successful also
The Brits also had what we attribute to ourselves as “Yankee” ingenuity. Prominent examples are the Sherman Firefly: a Sherman tank fitted with the Tiger-busting British 17-pounder anti-tank gun, as well as the P-5 Mustang variants fitted with high-altitude Rolls-Royce Merlin engines.
“Code-breaking insights”
Actually, it was the Polish that gave the Brits the insights.