Election, election, election, election

This week: some very big and very small constituencies, a step-free map of London’s rail network, and why anybody who’s nailed down a narrative about these local elections is lying to you.

Some things I am worrying about this week

The future of the Democratic Unionist Party, now that Arlene Foster is standing down as leader. (You thought I was going to say the Labour party, didn’t you? Don’t worry, we’ll get to that.)

I don’t mean to say I’m worried in any serious sense that the DUP are in trouble (they’re awful, I like it when they’re in t…