Fraoch from Scotland, which is heather ale. The few i've had have been very nice.
Quite a few breweries here do elderflower ales, usually a blonde ale, or similar.
I'm a big fan of the English Golden ales on cask, which are very common here in England now. Lower hopping than a typical APA, but with nice yeast and malts and a well handled cask process they can be really fantastic. With English hops is good but the American hopped versions are wonderful. You can combine English and American hops very effectively too. IMO bottle conditioned beer is closer to cask than it gets credit for. It's not exactly the same, but you can prime lowish and I find by swirling a pint it becomes pretty similar to a cask pint. I use around 4 to 5g per litre of dextrose for priming (not sure what this is in dollars sorry), which is a bit high, hence the swirling. I prefer this to priming lower, you get a nice condition and can knock out excess gas if you want. I'm a bit mid Atlantic with beers like this - mix English and American hops, use lower hop amounts than you folks but more than UK beers tend to, serve cooler than UK cask but not keg cold, more CO2 than UK but less than USA! Ha. Some UK pubs are serving cask a bit colder than is traditional, as it stores better and I suspect it is popular with a lot of people, particularly in summer - when golden ales are in full flow.