David and Sarah are as closely related as Charles, Anne, Andrew, and Edward.

Through it is interesting that Sarah and David's children were invited.

The Windsors have always marched to their own drum when it comes to guest lists and seating arrangements, so trying to figure out what the criteria was is probably an exercise in futility.

We did get to see a lot of people we don't see very often, which was nice.

What wasn't nice was the usual "Andrew and Sarah are back in the fold" and I imagine somewhere a reporter is regurgitating their usual "Andrew should not have been there" article.