Last year someone in Derry started painting the post-boxes green. All year they alternated from green to red and back again. It started me thinking about what a reunited Ireland would look like. Arafat reputedly returned to Gaza after the Oslo Accords saying he wouldn't stop until Palestine had its own direct dialling code. Sovereignty can come down to direct dialling codes and the colour of post-boxes; it should, however, involve much more.