http://www.device-developer-conference.co.uk
Just to let you know that this event is proving popular this year, so if you are thinking of coming along, it may be best to register sooner rather than later - especially for a place on some of the workshops.
It's Free to attend the exhibition and Conference presentations, £75 for a place on the half day technical workshops.
Bristol May 20th, Cambridge May 22nd, Manchester June 3rd and Scotland (Uphall) June 5th.
This event is also co-located with the Reliable Software Developers' Conference - http://www.rsd-conference.co.uk