Also this hour tackling the underground trade in superpower painkillers. A 25 year old drug dealer has been sentenced to eight years in prison for exporting and selling the extremely strong painkiller fentanyl on the dark web. And the little horse with a big dream. Well find out why digby is saddling up to become the uks first guide horse. Good evening and welcome to bbc news. The Prime Minister has been warned that her decision to leave the Eus Customs Union which allows goods to move between eu countries without tariffs will cause unavoidable barriers to trade. And the European Unions chief brexit negotiator, Michel Barnier, who was in downing street for talks today, said the time had come for britain to make a choice on what it wants for its future. But the brexit secretary david davis said being outside the Customs Union would allow the United Kingdom to strike new trade deals with the rest of the world. Heres our Political Editor laura kuenssberg. In a hurry. Notjust to catch the