Cats

On Jul 17, 12:01 pm, "Clive D. W. Feather" <cl...@on-the-
train.> wrote:
<snip>
>
> Finally, the Metropolitan Line from Finchley Road to Harrow-on-the-Hill
> is arranged UF, US, DS, DF, UM, DM. The Marylebone pair are to one side
> for obvious reasons, but I'm not clear why they put the slows inside the
> fasts.

Possibly the slows came first and the fasts were added later, but
having the slows on the inside means just one island platform and one
set of access stairs is needed. I can't remember, though, if that's
what the arrangements are!