Not strictly UK, but I'm sure it's of interest to some here.
Since it's local for me, we went along to the first Manhattan Cask Ale Festival yesterday, run by a guy called Alex Hall who used to work at the Evening Star in Brighton, he said. Held in Chelsea Brewing Company, over on the far west side of the Island (Chelsea Piers). He told me they'd ordered some stuff from Dark Star, and a few others in the UK, but it hadn't arrived in time and he'll put it on at the next event they're having in May.
35 odd US brewed cask ales on gravity. While one, BruRm's Charlie Mopps IPA - 4.0%, was the first thing resembling ordinary bitter that I've seen in the states (well, ignoring "Yuengling Lager", which isn't so very different to some UK keg bitters), the others basically left exposed the worst excesses of American tendencies in brewing and would have had most of the beers at even the National Winter Festival hiding behind the sofa (take a look at the top rated beers on BA, if you're in any doubt this is what they expect hereNice selection all the same, had a delicious organic "All American Ale" from Otter Creek brewing in Vermont, one of my favourite US brewers already, which weighed in at a relatively calm 6.0% and went down very easily. The Mrs liked a Smoked Rye beer and one of the death by hops beers from Weyerbacher. The barman gave us a free taster of the house brewed 1000Gyle which runs about 10.6% and is a bit like drinking hopped extract.
Interestingly, I saw the festival advertised in Sheffield, when I was there in February. Both the Wellington (former Cask + Cutler) and the Kelham Island Tavern were sporting posters for the event.
No admission fee, but beer was selling at $5/6/7/8/9 a pint, which I suppose isn't the highest I've seen charged in NYC, but should cover their costs anyway. Plenty were running out by the time we were done, and they were running again this evening.