technically, I don't think it's supposed to happen - in the world of rules, aircraft are supposed to follow the procedure from whatever fix is specified.
Au contraire - quite normal to vector for a non-precision approach; all specified in the UK MATS Pt 1. After all, with radar, what would you do with a sequence of aircraft if no precision approach were available? The manual is vague about phraseology though, admittedly.
2 s