So I go back out the doors from our train car...
Through the connecting car passage...
Glance at the whirring British countryside flying by...
And notice the very big, very bright yellow buttons on the side of the toilet door. (They say "toilet" in Engand. Not "restroom.") The photo is blurry because the train is moving. Or I jiggled my phone. One of the two.
One of the gigantic buttons says "OPEN."