Table:
text: 2009 British GT season
Calendar
Calendar
Round Circuit Date_ Pole_Position Fastest_Lap Winning_Drivers Winning_Team
6 Rockingham May 31 Hector Lester Alan Simonsen Hector Lester Alan Simonsen Oliver Bryant Joe Osborne Barwell Motorsport
7 Knockhill June 13 David Jones Godfrey Jones Hector Lester Stéphane Daoudi David Jones Godfrey Jones Team Preci-Spark
8 Knockhill June 14 Duncan Cameron Matt Griffin Gregor Fisken Daniel Brown Aaron Scott Craig Wilkins ABG Motorsport
9 Snetterton July 4 Daniel Brown Martin Short Daniel Brown Martin Short David Jones Godfrey Jones Team Preci-Spark
10 Snetterton July 5 Allan Simonsen Hector Lester Allan Simonsen Hector Lester Allan Simonsen Hector Lester Rosso Verde
11 Donington Park July 19 Duncan Cameron Matt Griffin Hector Lester Alan Simonsen Alex Mortimer Philip Walker RPM Motorsport

Question: When was Donington Park circuit for the 2009 British GT season?