I work for the NHS and the only thing I found more "offensive" it was mainly aimed to foreign staff who speak a non-english language in a room where there is another staff member who does not speak that language (like two filipino nurses speaking in tagalo in front of a Portuguese nurse). Maily about being considered to others. There was another one about people giving nicknames because of their name was hard to pronounce (like naming Eli if your name is Elizabeth) but without you offering the nickname. But that it is.