It's been hailed as a Brexit talks 'breakthrough' but is it really?

It's been hailed as a Brexit talks breakthrough but is it really? How much has changed since Monday when the DUP rejected the text first proposed by the European Union and the UK to move talks from phase one to phase two? DUP leader Arlene Foster says the new agreement means that the entirety of the UK will now leave the single market and customs union. Stephen got reaction from Conservative MP Theresa Villiers, UUP leader Robin Swann, TUV leader Jim Allister, SDLP MLA Claire Hanna, Fine Gael Senator Neale Richmond, Labour Shadow Secretary for Northern Ireland Owen Smith, BBC NI political editor Mark Devenport and BBC NI economics and business editor John Campbell.