I remember when the 123 was a trolly bus, it started on Corporation St. to Greenheys via Great Ancoats St; Pin Mill Brow, Chanceller Lane, along Higher Ardwick through the roundabout and up Brunswick St where it turned left on Oxford Rd past the university then it turned right. But can't remember the route there after. We used to catch it to Platt Fields park.
The problem now is that all the services seem to terminate in town, so it means changing buses.