As Leeds Castle have decide not to have their venue available (see the 'not supercar seige' thread) the latest is that they are negotiating a new venue, at some time.....

from their latest facebook post....

This helps us support The Royal Navy and Royal Marines Children's Fundwhich is the main focus behind any of our events.The team are currently negotiating a venue for a show this year.
With confirmation from most of the drivers, who have helped support our cause over the past 3 years, that they are willing to travel we hope to have some exciting news for them over the next few weeks.
so it's currently a mystery tour