RHS is a wonderful host for this conference. With over 100 attendees and many interesting speakers from around the world, it is an interesting conference on trialing plants. This afternoon, the discussion on the UK and Europe using the USDA Plant Hardiness Zone Map was fascinating. As Allan Armitage said, we Americans were both flattered and embarrasses at this! UK and Europe both need their own maps for climatic zones. Go for it!
The tent on the grounds at Wisley and inside the tent for the conference: