Confusion at Somerset House

Does anyone know what this means? I went to the loo at London’s Somerset House last week. I kind of thought that I was entering the right door, but that contradictory, weird symbol to the right made me doubt it. Meaningless symbols are worthless symbols; this one nicely sums up the state of modern Britain. 

So God created man in His own image; in the image of God He created him; male and female He created them. Genesis 1:27