thruxton date clash.

2009 British Superbike Championship calendar:

Round Date Circuit
1 10/11/12/13 April Brands Hatch Indy
2 2/3/4 May Oulton Park
3 23/24/25 May Donington Park
4 29/30/31 May Thruxton
5 19/20/21 June Snetterton
6 3/4/5 July Knockhill
7 17/18/19 July Mallory Park
8 7/8/9 August Brands Hatch GP
9 29/30/31 August Cadwell Park
10 11/12/13 September Croft
11 25/26/27 September Silverstone
12 9/10/11 October Oulton Park