Defence Minister, Phillip Hammond on the eight-day military training exercise taking place ahead of the Olympics:
“Whilst there is no specific threat to the Games, we have to be ready to assist in delivering a safe and secure Olympics for all to enjoy.
“The fact that our state-of-the-art Typhoons will be stationed at RAF Northolt underlines the commitment of the Ministry of Defence and our Armed Forces to keeping the public safe at a time when the world will be watching us.”
The Royal Navy's largest warship, HMS Ocean, sailed up the Thames today as the military stepped up security preparations for the Olympics.
The appearance of fighter jets in the skies over London will mark the start of an extraordinary Olympic test event.