Most home (UK based) students will move home with their parents when uni is not teaching. Throughout the summer they will either do absolutely nothing and sponge from their student loan & parents, or get a part-time/temporary job for a couple of months.
I would advise you speak to the university you will be studying at, they might be able to offer you a 52-week contract accommodation so you can stay at the University all year long.
You can probably also get work at the University to pay for the extra accommodation fee's throughout Summer.
Alternatively, England has some cheap hotels you could stay in full time. You'd have to make your own way there and find a way to transport all of your stuff but there are probably local hotels which will let you have extended periods at the hotel (2-3 months for about £35 per night), so obviously you will need a job to pay for your weekly bills (£245 on hotel, £30 on food, £15 on socializing, £20 on transport), so if you can get a job which pays like £350 per week then you should be fine. That sounds like a lot but if you put yourself out and about and offer to work like 8am until 6pm Monday-Friday, that's 50 hours per week, so at (approx) £6 per hour, 50 hours per week would give you around £300 per week. Get an evening job for weekends too and you should easily be hitting £400.
I know it doesn't sound like much of a life but that's it. You need a job to pay for additional accommodation I'm afraid.
Why not try to get a job whilst you're at University (studying), just a part-time one working 15 hours per week will rake in at least £70 per week. Save this up and then during Summer you will have a bit of money to put towards accommodation and then you won't have to work so hard.
Of course, your problems would be all solved if you had rich parents who could send you £2,000 for Summer.