Don’t worry, I was making a joke about Yorkshire being very insular - Manchester and Birmingham are very close to Yorkshire, and Bovril isn’t well known outside the UK.

“Cuppa” is quite a linguistically interesting word as it’s derived from “cup of”, but is actually used as a noun in its own right to mean a hot drink. The correct answers are yes if you want tea, no if you don’t want anything, and the name of your preferred drink if you want something other than tea, but there’s no real way of knowing that unless you grow up in the UK. Over here it’s so common that it’s considered a standard part of English by standard English people, so when talking to other English speakers they’re completely confused by them not knowing what is.