Everyone who has ever boarded a bus or train and headed into the city for work knows that commuting has rules.

Headphones are a must if you want to listen to music, for example; nobody else wants to listen to your Spotify Top 100 playlist (no matter how brilliant it is). Some people have their preferred seats – and even nodding acquaintances. And everyone has their own little rituals to get them through the journey, whether that looks like a thermos of tea, a dogeared book, or even a cheeky episode (or two) of their favourite Netflix show.

The number one rule that everyone adheres to, however, is this: do not talk to one another. Eye contact or a well-timed ‘tsk’ is fine – maybe even a quick ‘please’ or ‘thank you’, accompanied by a cheery (or bleary, depending on the time) smile. Chatting to absolute strangers, though? It’s just not done.

In Sky’s new Christmas film, however, that rule gets broken a thousand times over. And the result is… well, it’s actually tempted us to try and strike up a conversation with our fellow passengers someday. Maybe. If the mood is right, y’know?

This Is Christmas, Sky’s romantic new film, is honestly every commuter’s nightmare