Theresa May is poised to play for time by further postponing a final vote on her Brexit deal next week.
The Prime Minister's aides are believed to be drawing up a plan to make MPs' approval of the deal conditional on the European Union providing further concessions.
The move is intended to help limit the scale of opposition to the vote while buying time as negotiations continue with European Union leaders.
A Whitehall source said that while the tone of dialogue between Downing Street and Brussels had improved, they remained "far apart" on what each were prepared to accept.
Separately, The Sunday Telegraph disclosed today that Ian Lavery, the Labour Party chairman, has publicly described the campaign for a second referendum on Brexit as "disrespectful", as voters had already opted to leave.