We had a number of pieces of post not arrive at the end of 2011 (over a period of 3/4 months), including post from our bank, train tickets, and magazines. Suddenly, out of the blue, they arrived through the door two Sundays ago. I just wish I had seen the person who dropped them through our letterbox. Don't know if this was Royal Mail or someone who had received our post in error and took an age to come over to get them to us. A mystery that will never be solved. Very odd...