I'm reading through the PM's (@BorisJohnson) letter to @eucopresident. It makes some deeply worrying arguments about Northern Ireland, our peace agreement and the impact that Brexit will have on our rights and economic and social lives. @BorisJohnson @eucopresident To start with, I am no fan of the backstop. I think it does make a fair stab at shoring up the necessary regulatory alignment for north-south cooperation on areas like agri-food, environment and energy, but it is weak on rights guarantees and citizenship.