Ministry of Defence fighter jets are in place around Manchester United to protect London 2012 Olympic matches played at Old Trafford.
A five-mile no-fly zone is in place around the stadium and Typhoon jets are on standby to reach the Reds’ ground in 20 minutes if required.
If terrorists mount an air attack on Old Trafford while the London 2012 games are on going, the jets will set off from one of three bases across the UK.
The MoD said: “The no-fly zones are sensible precautions along with the enhanced addition of up to four Typhoons at three bases.”
Armed undercover police will be in place to guard fans and competitors at Old Trafford as the first game is played on July 26 – one day before the opening ceremony.
It is believed the planes will be on standby at RAF Northolt, in Middlesex, Coningsby, Lincs, and Leuchars, in Fife.
The no-fly zone will be in place during, before and after each of the matches.