I've managed to build the Tube Station over the past couple of days.
The inspiration; Lambeth North Station:

Here is the front:

The rear, with a small amount of detail on it:

I've changed a few things around, most significantly moving the entrance to the central arch. I've also added a newspaper kiosk on one side and a florist on the other. There are a few more details to be added (shop signs etc), most likely after most of the painting has been done.