UK PM spokesman: Chequers is the only credible Brexit plan

The UK PM spokesman, James Slack was out on the wires in the last hour, saying that we are focused on taking forward the Chequers plan and do not want a customs border down the Irish Sea.

Key quotes:

   •  The government has looked at options for Irish border, but Chequers is the only option.
   •  There is a commitment to no hard border and don't believe in moving the border.
   •  Says that Theresa May would fight any attempt to oust her.