Would it be odd to refer to English-style tea as お茶? If I were drinking English-style black tea, made by first placing a teabag in the cup, adding sugar, pouring boiling water on to it, stirring, adding milk, and stirring again, and a friend asked me, , would it be odd to reply, ? Would another term like be more appropriate?

Black tea is usually referred to as []{}.

> a friend asked me, , would it be odd to reply, ?

might be understood as Japanese tea (like, {} or {}).

> Would another term like be more appropriate?

Yes, is also common. So I'd recommend using or to avoid any confusion.

(That said, you'd still say {} etc. to invite someone out for tea or coffee... here you don't mean you're gonna drink Japanese tea at a cafe.)