As it happened: UK and Ireland Flight delays

Key Points

• Telephone glitch at National Air Traffic Service delays flights at airports in the UK and Ireland
• Air traffic officials say problem solved but delays to continue Saturday evening and into Sunday
• Thousands of people affected at Heathrow, Gatwick, Stansted, Cardiff, Glasgow and others
• Traffic controllers handled 2,800 flights rather than usual 3,500 for a Saturday
• Officials insist that safety "not compromised at any time" by glitch
• Ryanair urges aviation regulator to intervene to prevent further disruption