LGC does have a webcam:

http://www.londonglidingclub.co.uk/webcam640x480.jpg

home page
http://www.londonglidingclub.co.uk/

The club doesn't have a weather station as such, but looking at that
picture, you might want to start by trying to sell them a lens cleaning
brush!

Your contact is the Manager/Chief Flying Instructor Andy Roch

Very approachable splendid chap.

I have flown from Dunstable in the past but am now retired from active
gliding. But I was on Bison Hill Whipsnade a few weeks ago
photographing rare butterflies - now I bet you didn't know what was on
your doorstep!

Jack