From programme information on the BBC media centre pages, it looks like daytime are wrapping up for the year on 15th December. The Father Brown Christmas special being on 10th December - or at least during that week. So, Christmas programming looks as if it will start properly on 16th December. I suspect the Christmas idents will have launched a week before that though.
Sunday 10th seems to have David Attenborough overkill though, with Blue Planet II ending and then Attenbvorough and the Elephant at 9pm.
If we only get one life, why does it take several attempts to get it right?