Give a staff member student Timetable access but not personal details?

[coolhands]

In the Manage User / permissions area if I add a staff member the group 'Learning support assistant' they can't see a student timetable. If I give them (either Registration tutor or Class teacher) they can see the student timetables but also the student address details etc.

 

How can I give a staff member access to view student timetables but not other details?