So often there is a smell of frowsty mops in public toilets. I noticed it today in Tate Britain. The loos are cleaned regularly but the mop heads smell mouldy so the stale smell is carried about all over the floors. Have you noticed this anywhere? And do you flag it up? I have a map of London loos in my head so that I can walk round without worrying where my next evacuation point will be. The loos in Kew Gardens smell very fresh and pleasant. There is no excuse for big institutions to allow theirs to smell so frowsty. Or perhaps it is it meant to be an art installation in the Tate? Any comments, all you commenters?