I went for one day to Windsor to spend a day out of London. It was beautifully Christmassy decorated. Unfortunately, but filming and taking photos in the State Apartment in Windsor Castle is not allowed.
I didn't spent as much time as I wanted to because a lot of trains were delayed on that day so it took me much longer than usual to get to Windsor. And getting back home was even worse because trains were still delayed and I got on the wrong train where I had to change. I realized it around Twickenham station and decided to get off at that station and then figure out the way home. Big mistake because it was Saturday evening and station was packed with rugby fans trying to get home after the game. But even with all the travel complications I had a very nice day :)