[quote="stuartstaples"]To be honest Joe, I would find a good quality road tyre to start with and see how you go. For starters most circuits surface gives better grip than normal roads anyway (something to do with mu ratings) Add to that the fact that there will be less leaves, contaminants, cats eyes and white lines and voila.......grippa dee doo daah.
Buying a cheaper less grippy tyre will also do three other things]
I have to say I agree with Stu.
Even with my limited experience of track days etc I can not recommend the tuition sessions enough .
At the trackday at Snett in February I thought I was going pretty quick in the morning session and enjoying it quite alot. Then straight after lunch I went out with the legend that is Ben Devlin for a tuition session and Holy shit was I wrong about the morning session.
I ended up going round the first corner about 30-35 mph faster after the tuition. In all I cut about 10 seconds off of my lap time. ( not that I was timing myself, as this is not allowed on trackdays

)
I was on yokohama road tyres and I was astounded just how much abuse they could take and how far I could push the car, (and myself) when someone is telling you how to do it properly.
Hope that this helps in some way.
If not, please excuse my inane drivvle
Nik