SQLBits: April 7th - April 9th 2011 in Brighton, UK
Free community event on Saturday (April 9th) with a paid conference day on Friday (April 8th) and a Pre Conference day full of day long seminars (April 7th).
It'll be a huge event with over 800 attendees and over 20 MVPs. I'll be presenting on Saturday April 9th.
SQL in the City: July 15th 2011 in London, UK
One day of free SQL Server training sponsored by Redgate. Other MVP's that'll be presenting there are Steve Jones (website|twitter), Brad McGehee (blog|twitter) and Grant Fritchey (blog|twitter)
At both conferences I'll be presenting about database testing.