Kawasaki has confirmed Chris Vermeulen will not compete in ninth round of the 2011 World Superbike Championship at Silverstone after hurting himself in an accident last time out at Brno.

The Australian has been beset by injury woes since returning to the WSBK ranks at the beginning of the 2010 season, Vermeulen missing almost a year of racing due to an ongoing knee problem.

However, a similarly persistent elbow injury sustained in an accident at Monza in May has also conspired to hamper Vermeulen's attempts to get back up to speed, an ailment he aggravated with an accident during the Brno race weekend.

Though he started one race, Vermeulen sat out the second, with doctors advising him to miss Silverstone altogether and use the prolonged gap between that and the next round in Germany to get back to full fitness.

Vermeulen - a former WSBK runner-up and MotoGP race winner - has started just six races this season, scoring a best finish of tenth place at Misano.