They also have a tendency to edit, remove episodes, etc. And it does not even need to be for political correctness either. It could be licensing rights to music in shows. They will sometimes edit a show to remove the music or remove the episode altogether. (This happened with Scrubs.)
They will remove content that involves people talking about suicide. They will remove content that is offensive. They have even gone back and edited previous episodes and content. This has happened in Stranger Things (actual edits with no notice) and Arrested Development (a redesign of the fourth season that is far worse than the original version of it). (I could not watch the fifth season. It was way too terrible.)
How would you even edit that out? If I recall correctly it puts the whole character of Sophie in a different, much more naive, light. It's one of the first times we actually get anything longer than a small transactional interaction from her and it deconstructs some of the character that has been built up from Mark's (imagined, infatuated) head.
I might be misremembering the early series though, it's been a while since I've watched it.
This is a bit of a tangent but the scene as a whole also shows one of the key differentiations between UK and US tv is that UK tv doesn't have the apparently uncontrollable need to make the central couple seem desirable (and restrict them to "oh so human" flaws which aren't really flaws). This is also very obviously evident to anyone who has seen The Office then tries to watch The Office (US) where the Tim and Lucy characters are warped into star-crossed lovers who are destined to end up together. The US programme can't help but have an every-man character for the audience to root for rather than a more pathetic self-sabotaging character who kneecaps their own career progression for the sake of pursuing a romance that hasn't actually progressed further than the confines of his head.
This happens in physical media release as well, mostly i've seen music replaced with cheaper licensed music, I think the most recent physical releases of 'Community' still contain the episode that includes the 'Advanced Dungeons and Dragons' episode, that has been removed from netflix due to the use of Blackface (One character arrives at the game in blackface (actually jet black with a white wig) because his character is a Drow (dark elf), other characters call him out for being racist but he explains his character's backstory)
Do you know where I could read more about this (specifically suicide/offensive stuff). A cursory search only showed a scene being cut from 13 Reasons Why, but I would be very interested in learning more.
They will remove content that involves people talking about suicide. They will remove content that is offensive. They have even gone back and edited previous episodes and content. This has happened in Stranger Things (actual edits with no notice) and Arrested Development (a redesign of the fourth season that is far worse than the original version of it). (I could not watch the fifth season. It was way too terrible.)