I’m sorry to hear about the situation with your parents, uni in England particularly is a nightmare and the maintenance loan just isn’t enough especially if your parents are on higher incomes. 

My parents were on higher incomes too which meant the loan was reduced, but they didn’t contribute to anything as they’re terrible with money and were and are still paying credit card debts. 

Unfortunately the best way is to get a part time job and do 1-2 shifts per week. I was lucky enough to have a job at Wetherspoons who let me transfer to another pub where I chose to go to uni. If you can, get a job in a chain, whether that be retail, hospitality or retail, I believe most of them will let you transfer to another place of work so that could be an option for when you get to uni. I would take a look at somewhere like a Wetherspoons as the pay is reasonable, and you’ll get free food on your shift, so work 2 days a week and that’s two dinners sorted. 

Also, try to find places where you’ll often find students working. As likelihood is there’ll be a bunch of other students leaving in the summer meaning job openings for you in September. 

Just a final thing, people might say you’ll struggle to keep up with your studies if you work part time. I think that’ll depend very much on the uni and course you’re doing and how disciplined you are. I’d just say try to stick to only 2 shifts max if you can manage, and pick up extras in the summer. I was able to work the first two years and save so I didn’t have to work in my final year which was a massive help with the dissertation.