Theresa May’s opponents are discussing how to ensure the biggest possible vote against her Brexit deal in the Commons on Tuesday to stop her repeatedly bringing it back in different forms. MPs will be asked to decide first on a series of amendments to the prime minister’s plan, several of which would kill it. This could mean that it is never put to a vote.

Over the weekend, parliamentarians will be discussing which amendments to support, amid differences over parliamentary tactics.

Opposition MPs, second referendum supporters and Brexiteers are all looking for ways to find a clean “kill amendment” that as many MPs as possible can support to secure a majority against of more than 100. So far 15 amendments have been put down, although