I get an error message when I try to retrieve my personal timetable with my student number
You need to be a registered student to view your personal timetable. You can get this by following the instructions we sent you about registration from joining@beds.ac.uk. Further details about registration can be found here: https://www.beds.ac.uk/welcome/orientation/prereg/. Once you have registered your timetable with be updated within 48 hours.