Re: First Past the Post
"This. It depresses me how many people said they were voting for May or Corbyn when they are actually voting for their own local MP."
Why shouldn't they vote that way. It might make a difference if their local MP makes it clear they're going to oppose the party leader on some topic or other. I corresponded with my local MP over surveillance. He stuck by the party May's line. I told him I wouldn't vote for him as long as she remained leader and I didn't.
"There's nothing in the rules to say a party can't change their leader, and hence who becomes PM, 5 minutes after the election is won."
Probably not 5 minutes after it's won. After it's lost is a different matter. In any case if a leader who voters aren'tt prepared to support is replaced then the voters can act accordingly.
"So much so that even the press started calling the Tory Manifesto the May Manifesto."
In which case what's wrong with refusing to vote for her proxy, the local candidate?