"What the letter says is that, actually, there are are very good solutions that you could put in place that would obviate, prevent any kind of hard border but would allow goods, people - people of course move totally freely anyway because of the common travel area - allow goods to move freely without let or hindrance whilst allowing the UK to come out of the customs union, take back control of our tariffs schedules, take back control of our commercial policy, take back control of our regulation. It is a very positive letter."