The only track day I know of at Three Sisters is the charity event organised annually by John Francis. Next year's is August 15th. See
http://www.jpfcharity.co.uk/frMain.htm for details.
I've been round Three Sisters (as a passenger) in a rally-prepared Mk2 Escort.....fun! It's a tight little circuit, but with a reasonably long straight; I'd think it would be
hard work in an XJS! Now, of course, if you'd like to volunteer to give passenger rides around the track, John would be delighted........
