Carlimits is the company that does training there.
They are very known in the Lotus world as the original instructor, Andrew Walsh, is a race driver that did very well in the various lotus series and was once upon a time test driver for Benetton, I believe.
Anyway, I'm not sure that he still does much tuition, but he taught me in my lotus years ago. If the day has maintained the same format you'll spend the morning turning left. You will spin at about 50mph the first few times. You'll then be shown what you did wrong and how to do it right. By the end of the day you'll do the same corner at 90mph+ without spinning!
It's a day for learning car control, not necessarily a day of driving fast, although they often go hand in hand. You will realise that you're no where near as good as you think, and you'll probably drive home slower than you drove there in the morning.
I did 4 separate days there over a 2 year period, each time starting off badly and getting better by the end of the day. However, whilst you need to keep practicing, the skills you will learn will stay with you. And of course, may well save your life one day, or at least save you a bump or scratch.
Highly recommended 5 *****