A Heathrow spokesman said:
There are some longer queues than normal in the terminals, but we have spoken to border force and they are putting on extra staff.Obviously we want to sort the issue out but not risk the integrity of the border controls.
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Gianni Versace never got to live in the four-bedroom home as he was murdered before the purchase was completed.
The pop-up, called, Annie the Owl, will open in Soho in March where guests will sit in the company of owls.
The designs were unveiled as Boris Johnson claimed the flats and houses would be built six years earlier than planned.