Can't raise my contribution to the heights of some who clearly have a better knowledge and grasp of the NI situation , but I can say that on one working visit to Belfast (Castlereagh Industrial Estate) back in the late 80's I (and my car) was searched by British soldiers who politely let me know I wasn't welcome , as driving a British registered car with electronic equipment and tools in the boot made their life difficult.

Later that evening I was told politely by some people in a bar (in a repulican area I was stupid or innocent enough to walk into) that I wasn't welcome there because I was British.

Found me later that night back at my hotel reflecting on the fact that life sure was complicated in Belfast

Spot.