My last OU course was 4 years ago,and I was unable to attend the tutorials (aimed at all students on a particular course in a particular region), as it was too far away for me. Previous courses had tutorials here in Plymouth. I think the location of a tutorial will vary according to how many students there are for the course. Tutorials for my earlier courses were every other week.
Full time students were advised to expect to spend 16 hours per week in study. There were weeks set aside for reading-as there is usually a huge amount of it. Your are independent,yet you must adhere to a specific timetable of study..ie,,be on module 2,and chapter 7 by week 10. I have heard that the OU sets higher grade requirements than most universities....this was told me by my ex-who is a professor.