I've been thinking about this for months, and this would be the ITV Christmas Day schedule I'd personally go with, film rights permitting, of course:
ITV, Christmas Day 2014, my schedule:
10.00 Film:The Grinch (2000)
12.00 You've Been Framed At Christmas
1.00 ITV News, weather
1.15 Film:Katy Perry:Part of Me (2012)
3.00 The Queen
3.10 Film:Arthur Christmas (2012)
4.50 Ant and Dec's Christmas Day Takeaway (pre-recorded, obviously)
5.50 ITV News, weather
6.05 Downton Abbey
8.00 Coronation Street
9.00 Film:Skyfall (2012)
11.40-12.00 ITV News, weather
I think that would be a pretty strong line-up with which to beat the BBC, but I still think the BBC would come out on top, regardless. I was going to have Mr Popper's Penguins in the 1.15 slot, but Channel 4 gave it its network premiere the other week.