The Donington date for 2010 has been moved to later in the season, so i guess if there are continued problems an alternative date could be arranged.
2010 BSB Calendar

3/4/5 April Brands Hatch Indy circuit
16/17/18 April Thruxton
1/2/3 May Oulton Park
21/22/23 May Croft
25/26/27 June Mallory Park
9/10/11 July Snetterton
23/24/25 July Knockhill
6/7/8 August Brands Hatch Grand Prix circuit (triple race)
28/29/30 August Cadwell Park
10/11/12 September Donington Park
23/24/25 September Silverstone
8/9/10 October Oulton Park (triple race)

World Superbikes meant to return on the final weekend of July next year.