Hmm well, great UK bands at the moment who I've seen recently are Agnosy, Bullet Ridden, Poundaflesh, Certified, Only Fumes & Corpses, Bomb Blast Men (now disbanded but I saw them last week), Murder of Crows, Cry Havoc, Afternoon Gentlemen, Harry Callahan, Go fast or go home.
Best foreign bands I've seen recently are Human Compost (way intense, raw, fast French hardcore), Appalachian Terror Unit (not new but they're currently in the UK - yay!), Unhaim, Chickens Call, Atentado.
That should keep you busy for a minute or two. I'd prefer to go farther afield (Finland, Japan etc.) in recommendations but let me know if the above are horrible to you, haha.