Found by grahame:

He found it whilst at a meeting in London. Let's let Grahame continue the story:

"I just popped to the loo in the coffee break and, to my pleasure,
discovered a photo to add to your collection which I will hand over to you
in due course (or get it scanned in at the office). For the record:

5th Floor gents toilet
TUC Conference Centre

The picture was laying face up on the hand drier. It was slightly bent,
adding to the appropriately glum face for such a position."

thanks Grahame. great find.