![FILE PHOTO: UK Border control is seen in Terminal 2 at Heathrow Airport in London June 4, 2014. REUTERS/Neil Hall/File Photo](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/L7EE7EOGOVQSAJWPGEBKNGBHZQ.jpg?smart=true&auth=d85592d2423784473666d0f18282df5057764684637b63238870370ef75a9d62&width=400&height=225)
UK Border control at Terminal 2 at Heathrow Airport in London. Neil Hall.
UK Border control at Terminal 2 at Heathrow Airport in London. Neil Hall.
London airports descend into chaos as British Airways' systems go down — again
Britain's largest carrier apologised, saying 'temporary check in problems' had caused 'some delays'