Currently i am holding PSW visa my visa will expire december2011 now would like to do LLB hons degree program?

currently i am holding PSW visa my visa will expire december2011 now would like to do LLB hons degree program from HOLBORN college in London and which degree award by University of London my question is when i need to change my visa statas and if i do so can i get part time work right in London and can i bring my wife as my dependent