I'll have to point out now, the R.A.F is a poor quality air force compared to thirty years ago. It is under-equipped and under-manned. It's fighter is pathetic, and the only good capabilities of the RAF are transport duties and logistical support. And even that's in light logistical situations because we're short on helicopters.
The RAF and Royal Navy pilots are some of the best in the world, and they're certainly world renowned. I'm sure some of our pilots military or none, will know about the quality of the British military aviators.
But in a slugfest, the RAF has not single speck of chance against the USAF. I doubt the RAF would have a very nice day against the USMC or USN.
How can you compare an airforce with the Tornado F.3 as an air superiority fighter, against someone who has the F-15, F-16 and F-22 all operational as air superiority fighters. An airforce with no strategic bomber, against one that has the B-1, B-2 and B-52. The only thing we have that the U.S hasn't got is the world's fastest helicopter, the Lynx. But that's a pointless achievement in a full-scale war.