Dissertation question

I think I finally have my dissertation question, after hours of reading and research I think I have found a question that I will enjoy writing about, and it is......How are the working class portrayed in British comedy's. 

Being from a working class background myself I find it fascinating that the majority of British comedy's are focused around the working class, I want to find out why this is and if it is fair how the working class is being portrayed and what is the fascination of the working class? Hopefully all will be reviled.