The Prime Minister's Europe Adviser Olly Robbins has told Parliamentary Select Committee on Exiting the European Union that there is "not a withdrawal agreement without a backstop." Mr Robbins described the arrangement, which is to prevent a hard border on the island of Ireland, as a "slightly uncomfortable necessity for both sides." Report by Jonesia. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn