Just to mention that the Royal Horticultural Society is running two webcams at the show. You can see what's going on outside on the Show Gardens webcam, and see what's going on around the floral exhibits on the Great Pavilion webcam.
I have to say, however, that as I write this on Monday morning one of them has disappeared! When I see the man in charge of them... Ah, there he is. Geoff!!! (Just a moment...) OK... he's sorting it out. I'm sure by the time you read this it will be fixed.