(fashion) The Brexit process reaches what could be a make-or-break stage this week as Boris Johnson and MPs engage in an extraordinary test of strength.
Tory rebels are hoping that by the end of the week they will have forced Mr Johnson to admit he must extend the October 31 deadline rather than try to leave without a deal.
But if they fail, the PM could emerge strengthened - and if they win there is mounting speculation he could opt to call an election rather than bow to their will.
MPs and peers will start massing at Westminster on the last day of the summer recess.
Remainers are likely to be putting the final touches to their plans for taking control of Commons business and passing legislation to block No Deal.
The government will be mobilising its forces to resist, in what promises to be an unprecedented clash between the executive and the House.
The Commons formally returns. Speaker John Bercow is likely to give his response from the chair to Boris Johnson's decision to prorogue Parliament in mid-September until October 14. He has already branded the idea a 'constitutional outrage'.
Remainers are expected to table a request for an emergency debate under Standing Order 24. Mr Bercow is likely to approve the request, and bend procedural rules to allow them to use the time to table a business motion.
If the rebels win a crunch vote, they would be able to take control of the Commons order paper and pave the way for a short piece of