Dominic Walsh: What a customs union does and doesn’t do – and how it compares to the backstop.

Precisely because it would be a rather unnecessary addition to the current deal, it is hard to argue that the proposal would be a disaster for Brexit.

Robert Halfon: If you don’t like the backstop and you want a Brexit deal done quickly, there’s only one answer: Common Market 2.0

I voted for the Prime Minister’s deal today. But the Commons didn’t – and we now all need a positive alternative.

Theresa May: Why the Commons should vote for this improved Brexit deal today

We have secured legally-binding changes which address MPs’ concerns about the need to protect the UK from being stuck in the backstop against its will.

Henry Newman: Norway Plus, Common Market 2.0. Call it whatever you like, it could basically leave us as a non-voting EU member

It amounts to wishful thinking, not a workable, sustainable answer. And it’s not as easy to implement as some of its advocates make out.

25 questions about (another) early general election – and the horror show it could be for the Conservatives

The more one thinks about it, the more problematic it becomes.

Robert Halfon: Now is the time for Common Market 2.0, and an EFTA-type plan for Brexit

Plus: We must be the Party for social housing as well as home ownership. And: why don’t we trumpet our history of social reform?

It almost works

Were it not for the backstop, May’s deal would get over the line – with support from an overwhelming majority of Conservatives, including us.

Shailesh Vara: A Better Deal would solve the backstop problem

Our plan is supported by remainers like me, by leavers such as David Davis and Dominic Raab and, crucially, by the DUP.

Opining for the fjords

Norway-to-Canada was one thing. Norway-plus-the-backstop is another. It is inferior even to the Prime Minister’s proposed deal.

Chris Grayling: Here at Transport, we’re getting ready for Brexit – whatever happens. But here’s why I’m backing May’s deal.

If I had been offered this before the referendum in 2016, I would have seen it as a much better alternative to the status quo inside the EU.

George Bridges: The Prime Minister’s Brexit deal. The choice facing Parliament is compromise or chaos.

If you want to be sure that Brexit happens, however much you might dislike this plan, there is only one course of action – vote for it.

Daniel Hannan: I want to support May’s plan. But I can’t. It proposes a way of leaving the EU that’s exactly the wrong way round.

Instead of leaving the Customs Union but retaining chunks of the Single Market – we shall end up staying in the Customs Union but leaving most of the Single Market.

Nick Herbert: If Brexiteers vote down this deal, they risk the very outcome they abhor.

They would plunge into unknown territory that is most likely to lead to our exit being delayed, diluted – or even ditched altogether.

David Davies: I voted and campaigned for Leave. But here’s why I’m supporting the Prime Minister’s Brexit plan.

Opposing this proposal serves only to help those who wish to undermine our desire to respect the referendum result. It is only by being united that we can fight them off.

George Trefgarne: Why Norway-to-Canada is practical and legal – and offers the UK and EU a way out of a Brexit crash

A response to Jean-Claude Piris and others who argue that the idea simply won’t fly.