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Border Agency official condemns staff shortages

30 April 2012 Last updated at 22:48 BST

Immigration officers from Manchester have been rushed to Heathrow as passengers arriving at Britain's premier airport report long delays.

London Mayor Boris Johnson has raised concerns about the Olympics - saying the queues give a "terrible impression of the UK".

And a border agency employee has told the BBC that staff shortages are affecting security checks. But ministers insist security is paramount.

The BBC's Home Affairs Correspondent, Tom Symonds reports.