If you started in Higher Education before September 1998, the rules were different, and the above comment might not apply to you (you don't say if the loan started in 2001 or that's when you graduated).
If so the rules are these. http://www.slc.co.uk/about%20student%20finance /products%20and%20services/fixed_term_loans.ht ml
This website contains any other info on this topic that you may need.