What is it? - more revealed

First, thank you to all who have wished us a Happy Christmas. We went to church at St. John's, Blackheath with David and Penny, their children, my (and David's) parents and Penny's mother. Our other brother, Peter, and Penny's sister, Liz, arrived in time to join us for lunch. This was a jolly affair with 12 of us round the table; we just about finished eating before The Queen at 3 pm.

But you don't want to read about our family Christmas festivities - you want to know what the mystery photo is. Well, here's a bit more:

All will be revealed within a day or so.