The attempts at American styled pale ales by the British brewers were sometimes excellent, sometimes completely amiss. As most of the examples I tried were served from casks, they always came off as something of a hybrid Anglo-American type of thing.
The biggest beer I had while in London, Celt's Brigid Fire served at Euston Tap, a spot on British rendition of an American rye IPA, albeit served from a cask, with all the citrus and pine notes one would expect from an American IPA.
The original Budvar Budweiser, from which our massive American brewery hijacked its name. To my palate, there wasn't much difference from what I was used to. Interestingly, one Brit I encountered was under the impression that “all American beer” was like a watered down version of this. Despite the major influence the American craft beer market has had here and overseas, it’s still a seemingly small piece of the beer pie.