As well as a great list of words, there's some interesting summaries of what focus groups thought of certain words in their quick reference guide that was quite illuminating (for example: the use N word by black people)

https://www.ofcom.org.uk/__data/assets/pdf_file/0020/225335/...

> Warning: this report contains a wide range of words which may cause offence.

So does a dictionary. There is a world of difference between using a swear word or slur, for example, and citing those words as pieces of language.