The royal navys Flagship Carrier enters its home port of portsmouth for the first time. And coming up in Sportsday On Bbc News celtic play the first leg of their Champion League qualifier tonight at celtic park, they take on kazakhstan champions astana. Good evening and welcome to the bbcs news at six. After brexit, people and goods should be able to move seamlessly across the border between the Irish Republic and Northern Ireland, much as they do today. In their latest proposal for life outside the eu, ministers says there will be no return to check points and border posts. But critics say the plan raises as many questions as answers not least, whats to stop eu migrants coming into the uk from ireland through an unsupervised crossing . Our ireland correspondent, chris buckler, is in narrow water, on the irish border. Chris. George, people who live at this border rarely recognise it. But could all that to change once the other side of this water is still inside the eu and this part is