According to The Mirror, about 50 marine police officers in rigid inflatables and fast response boats were joined by up to 100 military personnel and a Lynx Navy helicopter for the familiarization exercises.
Dan Kitwood / Getty Images
A security exercise takes place along the River Thames on Jan. 19, 2012 in London. The exercise including around 44 police officers, 94 military personnel, 15 boats and a Royal Navy Lynx helicopter was conducted by both the Metropolitan Police and the Royal Marines and designed to test their joint capability ahead of the 2012 London Olympic Games.
Crime and Security Minister James Brokenshire said: "This exercise forms part of the comprehensive testing and exercise program that is crucial in securing the Games.
Alastair Grant / AP
A police inflatable vessel takes part during a combined Police and Royal Marines security exercise for the London 2012 Olympic Games on the River Thames in London, Thursday.