Q. Looking to purchase an old DVD, the British/London DvD
You are thinking of the 2013 Philadelphia Flower Show. That DVD is no longer available.
Here is the link to the Green Scene 2013 Flower Show issue.
PHS 2013 trailer for Show here on YouTube.
2013 Flower Show photos on Flickr here.
You can also do Google image searches on the 2013 Show and get images. Hope this helps!