Thanks all, great advice.
I took her on track for the first time at the weekend - Abingdon - so lots of run off space for some massive slides!!
The car does feel too softly sprung when looking for fast direction changes, but like others have said, I wouldn't want it any stiffer as a road car.
All in all, the car (bone stock) performed really well. Fast enough to keep pace with most stuff, a hell of a lot of fun on the tight hairpin (which could be taken fully sideways), and adjustable on the high speed stuff depending on whether you wanted smoothness, or lairiness.
If I were doing a lot of track work I'd definitely look to upgrade the brakes/suspension, but its a lot of fun right out of the box as long as you keep a close eye on temperatures and don't do more than 4/5 laps in a session. I just wish the exhaust sounded better!! (ah well - another mod to add to the list!)