Quitting Labour and Conservative MPs need to decide where to position themselves if they want to keep their seats. Even then, it's going to be a slog.
Here's what needs to happen if the UK's newest political formation wants to stand in elections as a party.
It doesn't matter that this new formation doesn't have a policy. The very act of striking out alone is a powerful message about the broken system that has landed the UK in this mess.
The Conservative Party might not be able to survive the fallout if May worked with the opposition against her own MPs.
It suddenly looks like the party of government has reached a compromise on its long-held divisions over Europe. But it's more an unseasonal warm spell than a complete thaw.
Fox hunting has been banned in the UK since 2004 – so why is it still happening?
While many staunch Conservatives would see Norway-plus as a 'betrayal', everyone else could probably live with it – unless and until they realise it won't put a stop to free movement.
The EU realises the red lines it needs to meet are now the British parliament's, not Theresa May's.
Looking back, it's a wonder the party is still together after years of arguing about this issue.
The prime minister may have won a vote of no confidence in her leadership, but Theresa May will struggle to get what she needs from Brussels.
The history of Britain's vote to exit from the European Union, known as Brexit, is not a tale of populist resentment toward globalization. It is a top-down story of leaders and elite ideology.
A cross party alliance? A fresh election? None of the options look particularly appealing right now.
This was the party admitting that no one else could do a better job of negotating Brexit.
The PM is in a tight spot, but can anyone else lead the nation into Brexit?
We can't agree what the 'will of the people' was in 2016, but these are the representatives they elected in 2017.
Theresa May is courting ethnic minority support for her Brexit deal with her rhetoric on EU nationals 'jumping the queue'.
Theresa May's Brexit plan has crumbled on contact with the reality of UK and EU politics.
Theresa May still faces a huge hurdle to get MPs in Westminster to agree to the Brexit deal.
An association with Brexit and a desire to win back the white working class aren't particularly appealing to minority voters.
Jacob Rees-Mogg speaks for a minority of a minority, so why are we letting him dictate government policy?