A walk on the edge

Every proper English town needs a proper wall.

The guardpost

Gotta have guards to guard your post, don't ya know.

A little worn

But hey, ya gotta have a wall.

Playing with the light

Can't let a single inch go to waste.

In the round

Let there be glass.

More glass

A cathedral's gotta have light.

Ain't it grand?

Yorkminster flexes it's chops.

The big guy

Needs a least a bishop to run this place.