My vote for the most helpful zone goes without any hesitation to "Solent".
They are closely followed by Heathrow Radar on 119.9 for SVFR across LHR.
Both these units have always offered a great service, sometimes under difficult conditions such as busy Sunday's when everyman and his dog seems to be flying, including some newer PPL's who are still getting to grips with RT proceedure.
At the other end of the scale I think Jersey could certainly learn a thing or two from the above units.
[ 13 July 2001: Message edited by: Flybywyre ]