I don't think so. As you say, not any sort of Masters degree. And even though the standard JD for lawyers has "doctor" in it, no one calls anyone with a standard 3 year law degree "doctor." Obviously there are aristocratic and clerical titles as well--in addition to various certifications (though those don't usually have a prefix-type title--mostly positions like Judge do).

>Yeah certainly, and even at university most lecturers I had I think were 'just call me (first name)'.

Of course not all lecturers have doctorates and you also get into the very academia "Professor" sensitivity.