Later today, Parliament in the United Kingdom is expected to vote on Prime Minister Theresa May’s deal on the divorce between Britain and the European Union. On Monday evening, Mrs May said she had received legally binding assurances that the backstop to prevent a hard border between Northern Ireland and the Irish Republic would never be permanent. So is this just talk or has something fundamentally changed? Professor Tim Bale, spoke to the BBC's World Service to give his take on the latest Brexit deal agreement. He said: “I think the optics of it are great for Theresa May and the Government, it does look as if there has been some shift, the questions is quite how substantial that shift is.”