I was there last year (it's not far for me!) and it was good. There were a few Nobles there (3-4 I think) Including a metallic brown one who insisted on REVVING REVVING REVVING REVVING REVVING REVVING REVVING all the way in, despite his car sounding a bit horrible.
They take you round the Jag emmissions test track 3-4 times, 3.5 odd miles per circuit, and you get a photo. The last time I was second row following their pace car, the guy said he'd only do the track limit, 70mph - he lied
I had the xj220 down to win! Did you see the m12 without the rear wing? We looked for it but couldn't find it. It's the first time I have seen one minus the wing.