Thousands of passengers arriving at UK airports were hit by delays on Friday after a technical problem disrupted self-service passport gates.
Heathrow, Gatwick, Manchester and Edinburgh airports all reported problems with the e-gates.
But a Home Office spokesperson said the problem was quickly identified and had now been fixed.
The problem came after weeks of passenger anger over queues because of Border Force staff issues.
The gates allow travellers with biometric passports to pass through border control without a manual inspection.