Stansted Airport has apologised to passengers for delays and says a full investigation will be held into how a plane came to offload its passengers at wrong gate.
The Ryanair plane landing from Lisbon at 9.20am went to a departure gate instead of one designated for arrivals. The incident sparked long delays as hundreds of passengers already in the departure lounge had to go through security again, causing long backlogs that lasted into the afternoon.
Some passengers tweeted they had been delayed for two or three hours.
Massive security queues at Stansted, again. Been in line for two hours now.
Major security incident at Stansted airport, queue for security over 3hrs.
The airport said things were returning to normal by the middle of the afternoon.
Airport now returning back to normal with delays to some flights. Apologies to those passengers affected.
With incidents of this type we always look to carry out a thorough investigation into precisely what happened.'
Security queues returning back to normal following an earlier incident. Delays of up to an hour on some flights, please check info boards.
Thousands of passengers are enduring delays at Stansted Airport after a security incident sparked by a plane disembarking at the wrong gateRead the full story ›
We're currently experiencing long security queues due to an earlier incident. Our apologies we're working hard to get you to your flight.
Following an earlier incident we're currently experiencing delays of up to an hour on some flights & queues at security. Please bear with us
A plane that was travelling from Geneva to Manchester had to be diverted to Stansted Airport last night after the pilot declared a medical emergency.
EasyJet said the Airbus had to land at the Essex airport because a passenger onboard needed urgent medical assistance.
The plane touched down safely at around 10.30pm.
"EasyJet can confirm that flight EZY1954 from Geneva to Manchester diverted to Stansted due to a passenger on board requiring urgent medical assistance. The safety and well-being of our passengers and crew is easyJet's highest priority. We apologise for any inconvenience experienced due to the diversion and resulting delay."
No-frills airline Ryanair is to introduce a "business class".
The low-cost Irish carrier has unveiled a new product called Business Plus which will give executives a range of benefits.
These include flexibility on ticket changes, 20kg (44lbs) of checked-in bag allowance, fast-track airport security at selected airports, priority boarding and premium seats.
The new service will start at 69.99 euro (about £56) and is aimed at the 25% of Ryanair passengers who travel on business.
Ryanair has also announced its summer 2015 schedule from Stansted airport which includes three new routes - to Cologne in Germany, Edinburgh and Glasgow - as well as increased frequencies on 24 other routes.
The airline also revealed its 2015 summer schedule from Dublin. There will be new services to Brussels Zaventem, Cologne and Glasgow as well as increased frequencies on 12 other routes.
Stansted and Luton airports have announced big increases in their summer passenger numbers.
The Essex airport reported a total of nearly 1.95 million passengers passed through its terminal last month - a 12.2% increase on the July 2013 figure and the best monthly figure since August 2011.
It continues a strong period of growth for Stansted which has now welcomed a total of 18.68 million passengers in the 12 months ending July - up 5.6% on the previous year.
Luton announced that it handled more than one million passengers in both June and July, making it the Bedfordshire airport's best summer yet.
Earlier this week Heathrow and Gatwick announced that they handled more passengers in July than in any previous month.
People living near Stansted Airport have just four weeks to get their views heard on planned changes to its flight paths.
National Air Traffic Services - which is known as NATS - is proposing to direct the majority of flights which currently head south from the airport to go east instead.
NATS insists there will not be any new routes - just new ways of using the existing ones.
The consultation ends on September 8.
An air accident investigation has started after two Ryanair planes collided on the ground at Stansted Airport in Essex. No one was hurt.Read the full story ›
Two Ryanair planes have been damaged in a collision at Stansted in Essex, one of the country's busiest airports.
Passengers faced delays of up to three hours after a Warsaw-bound plane and an aircraft from Frankfurt that had just landed, collided in the parking area of the Airport at about 6.45am.
The crash occurred when the wing tip of one plane and the tail cone of another "made contact", Ryanair said.
No one was injured on the ground or in either aircraft.