I'm currently in London with my 16 y/o daughter (DD). I usually post an ongoing report with each day as a reply. I don't know how helpful this will be for first time visitors, as DD and I have both been to London multiple times and don't have plans to go back to many of the major attractions. The actual purpose of the trip was the theatre, specifically to see David Tennant in Richard II. DD is a major Dr Who fan, and he played the 10th Doctor (for those who aren't fans, although I am assured by DD that every single person in England watches the show - I suspect that may be a slight exaggeration). So we have something booked for almost every night, but almost nothing in particular planned for the days. Just as well, as there aren't so many daylight hours in London in Dec and Jan.