At the moment it is possible to bulk import new students to Pupil Register but there is no way of bulk deleting them from a register. You need to go to each pupil individually, remove notes and then click "Unassociated". Even marking as "Off Register" needs to be done individually. It would be good if we could select the pupils we want and then click "Mark off Register" as one button or "Delete from Register" as one button (with the warning that notes will be deleted). Or it could be done by importing excel file similarly to how you add new students.