I believe I do have a timeline of events that you might find enlightening.
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.
Russ informs him that they cannot perform Ding-Dong! The Witch is Dead and that they have to stick to the original lyrics for Always Look on the Bright Side of Life, but can otherwise accommodate his (largely witch-themed) requests.
He explains that a crocodile has strong muscles for closing its jaw but only weak ones for opening it. He claims that the tattoo is to remind him that strength depends on how you measure it.
The song is introduced as being “from the diseased mind of the drummer” and features various dog impressions.
In a band meeting, one of the members of Pier Pressure suggests they do a cover of A Nightingale Sang in Berkeley Square. Russ insists that they should do “the famous bit” and gives a short rendition of Woof, Woof, Woof.
After an initial stunned silence, the rest of the band start to laugh at Russ’ insistence that this is how the song goes. Their hilarity grows as Russ sings in a high-pitched voice and explains that it is the nightingale doing dog impressions.
The lead singer resolves that they are doing the song. He dismisses the rest of the band except for Russ, to whom he says: “You and me are writing a song, Jawbone.”
When asked, Russ admits that he is only getting the tattoo because of peer pressure from his band. In fact, he tells her, that is literally the name of the band (although they spell it ‘Pier Pressure’ because of Hastings Pier).
The tattoo artist lets him change this answer so that she is allowed to give him the tattoo, but tells him that she can stop anytime he wants.
On his way out for the evening, Russ is quibbling with his mum, Deborah, about the time he needs to be home. Russ tries to argue for midnight, then 11pm, but Deborah insists on 10pm, after invoking the threat of 9pm.
Then, on his way out the door, Russ comes out to Deborah with a forced casualness, saying: “Not a big deal or anything, but, as it goes, I’m gay.”
Deborah stops him from leaving so that she can express her support for him. She also insists that she is totally surprised by the news.
Russ sees through her fake surprise, since his mum specialises in reading people. Deborah admits that she already knew and Russ tells her that he already knew she already knew.
Russ then attempts to change his curfew to 11pm again, but is told that being gay does not get him an extra hour.
Craig then takes Russ’ guitar, but loses interest when Russ refuses to fight him for it, so he returns it.
Russ, realising he will be late home, asks Craig for 20p to call his parents. Although the sum is revised to 10p, Craig does give him the money under the instruction that he tells no-one.
Russ learns Newt’s name, which leads to a discussion of amphibians and, in particular, why turtles are not amphibians. Newt gives him a brief scientific explanation of the difference between reptiles and amphibians, but Russ does not want to hear more.
Instead, Russ asks Newt for a story about Teenage Mutant Hero Turtles. Having been informed that the turtles names are Michelangelo, Raphael, Donatello and Leonardo, Newt tells Russ a story about turtles in Renaissance Florence.