St George's makes sense. One of the major concerns will be security and the cost of it. If they want to limit people complaining, this is one area. St George's offers built in security, especially if they don't open the grounds to the public. It also offers a local for the day time reception and a night time one as well.
Yes it may be the same church as her sister but doesnt mean will be the same. Music, flowers, readings these all add different touches. And when you have a religious wedding, the real difference lays more in the reception anyways.
That's true.
I just feel that, if I were Beatrice and had a choice of venue, I'd want something different than the site used for the last three weddings.