Rovers window to nowhere

Here's a camera angle that you don't often see. It's the wall that is on the Rosamund Street side of the pub and it's got a window in it, a window that, while maybe it is all the way through to the outside, isn't one I've ever noticed. *And* there's even a little sill under it to hold a vase.  There is a door on the Rosamund Street side which, I assume, comes out from the kitchen but I've not noticed a stained glass window. It's pretty though, isn't it?