George is fast asleep after his lunch, which looks to have been quite a large one judging by the size of his stomach and the remnants on his shirt. As the Queen's speech is, and always has been, at 3pm and George looks to have been asleep for a good 20 minutes, it must be around half past two, meaning that George and Lynne have their Christmas dinner at around 12.30pm, which seems sensible.
Due to the fact that Lynne has to keep some of her thoughts to herself, the person on the other end of the phone is someone close to George, as it would be to call on Christmas Day. The person on the phone could be George's mother, who has emigrated to Australia. Her and Lynne don't get on that well, mainly because Lynne is still yet to bear her any grandchildren. Telling her that she returns George's presents would not go down very well on the other side of the world.
After a long pause, which Lynne plays off as a bad line, the phone call must end as the hour of three is fast approaching. George has to be woken and this phone call is costing a small fortune. For anyone watching the ITV movie, the Queen this year will talk about lessons which adults can learn from children and feature film of Prince Harry's christening.