direct to your inboxCalls have been made to scrap part of the Brexit deal relating to Northern Ireland, as Boris Johnson warned Brussels he will act to prevent trade barriers being put up in the Irish Sea.Northern Ireland's First Minister Arlene Foster said the Northern Ireland Protocol risked the country’s “political and economic links” to the UK and called for it to be replaced amid growing tension among Unionists.The agreement on Northern Ireland was seen as a way of resolving the main