Student Finance Watch
I should say when budgeting i basically only budgeted for when at uni, during the holidays I go back to my mum's and she pays for my food when im there and I don't pay rent when at home, or shampoo/toiletries when im at home, just in case you need to budget in home living
It really depends on the person's funding allocation, the city and spending habits.
If you are from a high income household and are not receiving help from your family in a fairly expensive city then it might not be and you may need a job to help with paying for your university experience.
In addition to this some cities are going to be cheaper generally and whatever your local shop is can really determine how much extra spending you have alongside your own shopping habits.
I've put together a post outlining how to budget. If you have a look at this noting your awarded amounts for student finance and then factor in the city costs for travel or accommodation then you should be able to get an idea of how far it would stretch and if you would need a job or not.
I hope this helps.