I tend to think that article is bird cage fodder just like anything from any other British tabloid. The claim is that Louis will be left with Kate's parents while George and Charlotte go to church with the rest of the royal family. So, does that mean that Michael & Carole will be at Anmer for the holidays this year instead of at their own home? And what of Pippa & her family and James & his fiancee? I'm not sure Anmer is big enough for that many guests, but what do I know? Perhaps the other two are going to their spouse/fiancees families for the holiday. Guess we'll know in another 8 days whether there was any truth to this story. If not, I'm sure the Mirror will have some plausible reason why their source was wrong, lol.
I think Kate's parents will be at Amner Hall, I thought that even before it was said in this report as Kate and William didn't go to Bucklebury last year so I guessed they would be going this year. I have a feeling they are only going to Norfolk now as there will be no Harry and Meghan and they want to support the Queen with the Andrew thing going on too. Amner Hall is reported to have 10 bedrooms so plenty of room and, of course, it's not the first time her family have stayed there for Christmas.