The press release says, Monday 30th April 2012:
“The recent exceptional rainfall has left the ground at Badminton totally waterlogged and partially flooded. Further rain is due this week leaving no chance of the ground drying out. Very sadly therefore the 2012 Mitsubishi Motors Badminton Horse Trials has been cancelled.
Purchasers of advance tickets, exhibitors, Sponsors and riders will of course be refunded as soon as is practical.