Just watching UK TV Gardens when the announcer, Sven Wombwell says...
"Gardener's World has been going since 1968 and they haven't run out of tips and tricks for your outside space"
40 years and NO celebrations, how odd, or did I miss them? ::)
Missed them. There was a special garden at GWL to commemorate it, and I'm pretty sure they mentioned it on one of the programmes.