Good luck with your visa,but you will find its only 20 hours a week,this is from UKBA's own site,my sis had some foreign students working for her,very strict about the 20 hours per week working rule.
Working while you are in the UK
During your stay, you will be allowed to:
work part-time (up to 20 hours per week) during term-time;
work full-time during vacations;
do a work placement as part of your course;
work as a postgraduate doctor or dentist (if your course of study is a recognised Foundation Programme); and
be a student union sabbatical officer for up to two years.
