The LiTTLe Conference
Ashford, Surrey
July 14-15

Information will be here and even more at http://www.lttl.org.uk/
but at the moment, last year's information is still there.

What I know is vague but definite :-)

There is a school by the Ashford train station (walking distance)
which is one stop from the Feltham station (right next to a hotel)
which is one stop from Heathrow.