I have booked this one:-

http://www.hottrax-online.com/product_info.php?products_id=360&osCsid=642cc9a6186fd3db2bd843f5fbef86fd

they even give you lap times on a print out afterwards. The 21 is still giving me grief so I may be taking the 28 as well.

Anyone else????? Maxim and Tom seem quite keen.