However, the army has occasionally been deployed to the airport during periods of heightened security.
Even so, Heathrow has been the target of robberies.
For example, on November 26, 1983 there was a robbery from the Brink’s Mat vault near Heathrow of 6800 gold bars. Only a fraction of the gold was recovered.
In March of 2002, thieves took $3 million dollars that had arrived on a South African Airways Flight.