I started my Labour analysis by assuming that the coup to remove Corbyn would be successful. That in itself throws up all sorts of problems, but it's indescribably worse if the coup is unsuccessful. Here's a version of what might happen next:
The motion of no confidence (or whatever the technical term is for the vote today) is passed easily. Corbyn refuses to resign. The PLP get 50 or more MP/MEPs to nominate a single challenger (presumably Watson or Eagle) and Corbyn announces that he will contest the election, and that NEC rules mean he is automatically on the ballot.
The PLP don't agree with that, but the NEC (which is marginally pro-Corbynish) uphold Corbyn's view in the face of massive protests by the membership. Corbyn wins the vote by a reduced margin and is returned as leader.
What the actual fuck do Labour do next? Answers on a postcard please.