You don’t get to see much on the Tube. Obviously being underground doesn’t help but often it’s so cramped you can’t even look down the carriage: the best you can hope for is a relatively plain shirt or jacket in front of your nose. If the pattern’s too busy your brain starts constructing one of those disturbing 3D images that eventually form out of apparently random dots. You end up travelling from one side of Town to the other staring at a black and white pineapple floating on a stranger’s back. Once all I could see from Shepherds Bush to Baker Street was a close approximation of Janet Street Porter’s head bobbing gently off the sleeve of a short Polish man. Today however, I looked up not down, at the hands wrapped with white knuckles onto overhead handles. I could see seven or eight hands probably. Every one had immaculate, I mean immaculate, nails. Men’s as well as women’s. Beautifully manicured and shaped, not chipped, not uneven, not a bitten one among them, not a shoddy cuticle in sight, no varnish, no tips, no dirt, nothing but perfection. Forty-odd fingers and thumbs - all faultless. Then five ragged, torn and filthy ones. Mine.