Fresh concerns over Heathrow border security
12 July 2012 Last updated at 22:24 BST
There are new concerns over whether Heathrow will cope with the influx of travellers heading for the Olympics.
In his latest report, the Chief Inspector of Borders, John Vine, says some staff are not dealing with passengers efficiently enough.
However, he said all border security checks were now in place, after an earlier visit found this was lacking.
David Bond reports.