Why is it, when you are in your normal car you spot an NG?

Sunday evening I went to the cash point outside ASDA at Swanley, the only other car in the carpark was a Red NGTD. Unfortunately the driver left before I got near the car dispite my waving (or maybe he thought I was mad).
Tonight, while leaving the carpark on the otherside of the same ASDA, I look in my rear view mirror and there was a cream NGTD behind me, nowhere to pull over because we were approaching a roundabout and they went a different direction!
Maybe I need a sticker on the car saying "My other cars an NG".
Are either of these people on the forum?

Martin

It's the nice weather. They've just been let out. They always rush around a bit at first!!