It happens on the first Saturday of each month at the British Motor Museum at Gaydon. Check out the website for more info: http://www.jaguarbreakfastclub.org.uk/home.
I'm looking to attend on 3rd December and would love it if a few other owners from down south fancied convoying up there?
Granted, on the way up it may be a bit dark and dreary, being December, but fingers crossed for a fine day and the drive back could be better!