A quote from another forum , don't know if its a genuine posting or not but here it is anyway -
I was a passenger on this flight. The Airbus Etihad flight EY19 from Abu Dhabi arrived in UK airspace over Southend a little ahead of schedule. The co-pilot gave us the information about conditions at Heathrow and that we would soon be on the ground. I had my in-flight entertainment screen set to the map showing the position of the aircraft. Nothing at this stage suggested to any of us that something was wrong. I noticed that we banked right and made a couple of circles over Essex. I thought nothing of this expecting the flight deck to receive permission to start their approach.
I thought something was odd only when the destination on the map changed to London Stansted . Nothing was said over the PA and I was one of the first to realise that we were not at LHR (the M11 looks a lot like the M4 at altitude). As we landed we all heard the scream of a high performance jet fly over the top of us. We realised then that we had had an escort. Still nothing over the PA until we were well on our way to a quiet spot out of the way on the airfield.
I was sat close to the rear of the aircraft in the centre section (seat 46C). The flight was not full so there were plenty of empty seats. Several hours earlier a male had moved into the two window seats (46A and B) across the isle from me and made himself comfortable there. Some time later a member of the cabin crew asked him to vacate the seats and they brought another man from elsewhere on the plane. He sat down in 46B. It was never clear to me or any of the other passengers around me why this was done. None of us engaged him in conversation. His manner was a little restless but nothing about him suggested that he was the worse the wear for drink or in any way aggressive. When asked if he wanted anything he did ask for a double scotch, but this request was politely over-looked and the pax made no demands.
So, we had landed unexpectedly at STD. As we pulled up at our isolated parking zone the captain told us where we were and that there was a security problem. We were instructed to remain in our seats. I was not near a window, but could see a couple of airport vehicles standing off to the port side. My fear at this stage is that there might be a bomb on board. The atmosphere on board remained good humoured throughout the whole event.
After a long while the rear starboard door was opened and armed police entered. Two of them started purposefully down the isle as next to me as if they were going to walk to the end, but after two paces they were beside my seat and suddenly pounced on the passenger sat beside me. They cuffed him and let him out.
This seemed to surprise the pax as much as it did the rest of us.
After landing and as we taxied a few of us exchanged our first words with the man. He spoke with a Scottish accent. He said that it was his first trip back to UK in 30 years. He had a packet of Peter Stuyvesant cigarettes in his hand and made the comment that you could smoke anywhere 30 years ago. Strange I though, as he would have been a child at that time. He spoke of cars from that era specifically mentioning the Ford RS Cosworth and road legal McLaren cars. He also mentioned a friend he had on the plane who was in 1st class. He was a 'hippy type ... you know, long hair and glasses. No offence' he said, directing his comment at the bespectacled passenger sat in front of me. So, this man did have some odd conversational skills, but nothing that really set off any alarm bells with the rest of the passengers in my vicinity.
After his removal and after several hours the aircraft was moved to a place where they located the man's luggage in the hold and refuelled. We had landed at midday and before 5pm we were airborne again making the short hop to Heathrow.
The story does not end there.
Upon landing at LHR passengers got up and waited in the isles to disembark. The captain made an announcement. Heathrow were 'not ready to receive us''and would pax return to their seats. This done two policemen I think I recognised from STD came from the front of the aircraft and led away a second man of about 65 years of age from seats A and B several rows ahead of me. I later saw the police and the man at the carousel in the baggage claim area. Additionally all passports were checked by half a dozen or so immigration personnel as we left the aircraft.
The outside temperature at STD was about 6 degrees C. the aircon kept running throughout the event making the cabin a little cool if anything. I could have done with a hot drink and a bun toward the latter stages but no hospitality of any kind was offered. But everyone stayed in good spirit throughout.