Your fees for the academic year will be presented to you when you enrol.  If you are on a course of more than one academic year's duration, your fees will remain the same for each year of the course. This would only be revised if you have to repeat an academic year or have a break in study.  
If you are considering interrupting your studies or needing to repeat a year you can obtain information on any resulting financial liabilities from Student Billings or the Student Loans Company (SLC).