Working class families always managing to access money, even if previous storylines have had them being ripped off. E.g. "We'll find that £10,000 deposit". How? Where from? Your daughter still owes you an inexplicable £50,000 from being ripped off by a conman.
They can always get a GP appointment and Social Services are always remarkably on the ball, arriving at the doorstep over the most minor of issues. Also, no CAMHS or counselling waiting lists.
Something major will happen in, say, a hospital. They don't start talking about it until they walk into the house despite having obviously driven home together. Like they sit in silence in the car as some sort of pact to only talk when they get home. Ditto when something significant happens at night but they only discuss it at breakfast the next day, having showered and dressed.
18 people and a dog living in an end terrace with no clutter.
Even when it's quads, they still get ample "me time".
If you don't make it to train/tram/airport in time (within the invisible soap zone) then they'll be GONE FOREVER! (Woe betide there is a later train, tram or flight you could follow them on).
When there's a knock at the door and as they get up they say "you're always forgetting your keys" then open the door chatting the same. I've never opened the door talking.
When the protagonist finally wants to fess up, their counterpart says "let me talk first" and it's always some life-affirming announcement rendering said protagonist speechless.