Had that a couple of times at Brum (and only Brum), although the last occasion was some years ago. I asked for his I/D and took my time studying it. Handed it back and then produced my I/D as I asked him how I could be of help to him. He asked what my destination was. I told him. He asked if I was going for business or personal reasons. Told him I was going to work. Asked what my occupation was and where I worked. You must have missed that bit on my I/D you just looked at I replied with a friendly smile. He wished me a good trip.