According to The Times, the issues caused delays of up to four hours at Heathrow, with some passengers having to be processed manually. The Home Office confirmed shortly after 2.30pm the issue had been resolved.
A spokesperson for Heathrow airport said: "We’re aware of a systems failure impacting the e-gates, which are staffed and operated by Border Force.
"This issue is impacting a number of ports of entry and is not an isolated issue at Heathrow. Our teams are working with Border Force to find a solution as quickly as possible."