Scotland Yard has tonight launched a major investigation into the robbery of a shipment of $6.5m dollars in cash from Heathrow Airport. The heist, which is one of the biggest in Britain for several years, has raised new fears about security at the airport.

Police were called to the airport by security staff early today after reports of two men escaping with the money in a van. It appears they stopped a van which was carrying the cash while a plane refuelled.

The cash had arrived at Heathrow on a jet from Bahrain and was bound for New York. The driver of the security van was found with his wrists bound.