Angry passengers reported queuing for nearly two and a half hours last week – with some starting far outside the immigration hall – to be met with empty passport control desks and uninterested staff.

Labour on Sunday night warned the Government it had to get a grip of the “immediate crisis brewing less than four weeks before the Olympics”.

BAA, which runs Heathrow, admitted that target times for passengers passing through immigration were missed.

Union officials warned of a doomsday scenario caused by the “triple whammy” of fewer fully trained staff, an influx of holiday passengers, and Olympic crowds.

Read on...