The label on the Robertson's that I bought includes fruits, peel, and (surprisingly) palm oil and sunflower oil, making it ok for vegetarians. It was nice, but I jazzed it up by adding more apples, nuts, and brandy. If you are interested, this site has a nice summary of mince pie history.
I think it would be nice sometime to make my own from scratch, but you have to make it well in advance and let it age, so for now I'm happy with the Robertson's. And the Lord of the Manor was certainly happy with it. Even though he had never tasted it before, he proclaimed it wonderful. Could it be his Scottish genes rising up to assert themselves?