Britain's busiest airport, Heathrow, said on Friday that a systems failure is affecting the e-gates which allow people to cross the border in the airport, adding that the issue was also affecting other points of entry.
The e-gates are staffed and operate by Britain's Border Force.
"Our teams are working with Border Force to find a solution as quickly as possible," Heathrow said on Twitter.
(Reporting by Sarah Young and Paul Sandle; editing by Guy Faulconbridge)
