An Incident at Manchester Airport

Embarrassing Incident At Manchester Airport Last weekend I travelled over to Ireland for my granddaughters 21st birthday, when I got to Manchester airport I could not believe how quiet it was and I sailed through security apart from having to take my shoes off and put them through the machine, not sure what that proved at all.
Not having had lunch I went and bought a meal Deal then found a convenient seat where I could see the departure board and my flight boarding gate, I put my MP3 player on, got my paper out and started to eat the sandwich,
I’m not quite sure why but I suddenly felt I was being watched, so looked up, the young man sat opposite, who looked very intense had a pad on his knee seemed to be staring at me, then doing something on his pad, being conceited I thought maybe he’s trying to sketch me, so continued with my food and reading. I’m not sure why but I started to think about what he was doing, so now started watching him,
he looked very very intent, and I suddenly noticed he was not drawing but writing notes. I couldn’t decide what to do, should I confronted him, should I try to absorb myself in my magazine music, should I move seats, the information desk was nearby, maybe I should mention it to them, in the end I decided to move across the way so I was not in his line of sight and see what happened,
what I noticed was that he continued with the same behaviour, I now started to wonder was it something to do with the till at Boots behind me, it all seemed rather odd.
A member of staff came and started working at the information desk, so I decided to have a word with her, I politely explained and said it was a gut feeling that something was not quite right, she asked me what she wanted me to do, explaining that she could not approach him.
It was decided in the end that she would contact security and be advised by them, so I felt that was the end of it all. A few minutes later she came over to my seat, to inform me that she had spoken to security and that they had informed the police who would call down and chat to me about the problem.
Oh dear this was not what I was hoping for, I prefer to be anonymous but now was going to be the centre of attention and the man was going to know it was me that reported him. A little time later two young policemen arrived, I explained to them what had happened and how the man of made me feel quite uncomfortable and that may be there could be problems with other passengers because of his odd behaviour, we gave a description of him because by now he had disappeared, which in itself seemed a little odd,
one of the policemen took my details and said he would let me know what had happened. A few minutes later they came back, it appears that the man was a French person, an accountant in fact he was busy working on a project and had been totally absorbed in this, oblivious of all around him, he was flying back to France and everything checked out,
of course I was totally embarrassed, but the policemen reassured me that I had done the correct thing and it was better to have made sure all was well, I spoke to lady at the desk, she said similar, and also said there was something about his appearance and manner that could be a little off putting, but that all had worked out well in the end.
I am still unsure what it was that set me off, was it some basic instinct, was it the stress of being at the airport, was it something to do with getting old and less sure of myself, what would I do if a similar incident happened in the future, let’s just hope it just doesn’t happen.