Indeed. I would add that you should ideally only move into the left hand lane if there is a two second gap between you and the car in front AND the car behind.
Indeed. Always happens heading south from Handcross Hill (though this is being made into 3 lanes) where the two lanes feed into the outer two lanes and therefore the left lane up the hill remains unused (except by me). This has happened literally HUNDREDS of times when I've used this stretch of...