I believe I do have a timeline of events that you might find revelatory.
While playing a round of charades, Deborah calls the rest of the family “spaniels” for deliberately avoiding the correct guess, even though she had already revealed the answer accidentally.
The family each rip up the hat that they get from their cracker, although Alex has to first be reminded to do so.
Instead of Christmas pudding, Deborah has half a scotch egg.
At one point during the call, Alex tells Toby to let their dog, Oswald, out.