piatkow - 7:09 pm on Apr 27, 2013 (gmt 0)
And no, it is not possible to travel by road from London to Paris as you suggest.
But you can go by train.
The underlying confusion arises partly because the ISO-3166 code for UK is GB. I don't know the real background for this but the story is that the official responsible thought that his brief excluded Northern Ireland.
Crown Dependencies have their own ISO-3166 codes and have different tax regimes.