In reply to Offwidth:
Stepson recently got into dialogue with the student loans folk as he entered the last financial year during which he'd be due to finish payment. The system seems a bit arcane in that the money they take off your salary each month, only gets paid to you loan balance once a year. So what he agreed with them was to set up a standing order, so that he paid the last bit from his bank, rather than letting them deduct it from his wages.
Outcome is that the loan, and the SO, finish in September, whereas the direct debit would have continued til March.
So the moral is to get in touch with them BEFORE your loan finishes.