Can there be a family in the country who does not have some relative who has posed with Buckingham Palace in the background? It is a fine landmark against which to note the passage of time.
This is probably around the time of the most recent renovation of the Palace (I've read that the Palace is in desperate need of repairs; the roof is leaking, central heating needs replacing, and chunks of stone are falling off the building).
I hope they get it back in shape quickly. I can't imagine it would be left to deteriorate?