Mansion House

That's a very interesting piccie. I've read about Mansion house having two bays before, but I'd never considered the layour when it was the terminus.

Don't suppose anyone knows why they extended alternate roads rather than the outer roads (which would have enabled terminating trains to return west without blocking the eastbound). My guess is something prevented the northernmost road from being extended, which led to the single central bay with the northernmost closed for as I said, blocking the eastbound?

...that said, the Met seems to manage OK at Baker Street with two outer bays (though, again, why they didn't stick the bays in the centre is beyond me).