I had 12 sprint sessions when i ran my Mk1 earlier in the year. £49 is a bargain. I paid £39 as im a member. Ask on CGTI.
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If you look at the video on the thread i posted, that was actually me in my Mk1. Gives you an idea of what 1 session is. Also, ask Nick. Im sure if his car was ready he would have been running it there as he has previously in its earlier spec.