I’ve not heard of anything in the UK but I believe there’s one in Holland which depending on where you live in the UK could be quicker to get to than other parts of the UK.
Would love to see an EE conference in the UK in 2012, this was the last one I know of: http://eeuk.org/ I hav.en’t heard of any plans to hold any more, but i believe it was Ian Ebden that organised it.