[London) — A perfect cloudy afternoon thing to do in London is to go walk among the stalls of Borough Market.  Tucked under a viaduct and carved out of various nooks and crannies, the Borough is just a great place to while away a morning, then head out to see other sites around central London. Go early and beat most of the crowds.  And make sure you check out Monmouth Coffee, some of the best coffee I’ve had.  The lines are long (for a reason) but their system moves you fast.  Grab a cup, have a walk ’round.