There is a student loan system in the UK which means that any student who wishes to go to university, and is bright enough to secure a place, can do so provided they are willing to repay the loan at a future date. Some students are fortunate enough to have wealthy parents who can obviate the need for a loan, but students from the poorest homes can have loans on the same basis as anyone else if they wish.
Student loans carry a low rate of interest and are only repayable when the graduate is earning a minimum of £15,000 per annum, a figure which the government proposes increasing to £21,000.
The current furore is because the government proposes increasing the maximum amount a university can charge students in tuition fees from £3,000 to £9,000 per annum. This would mean that some university funding is shifted from general taxation to the students themselves.
The underlying issue is that 30 years ago in the UK, about 10% of 18 year olds went to university. The country could afford to support that and even gave students means-tested maintenance grants. Over the last 30 years, however, the university system has expended to the point where about 45% of 18 year olds go to university and the country can basically no longer afford to pay for it. The increased numbers at university are also of dubious desirability given the attraction of "soft" subjects such as Media Studies over anything with any degree academic rigour.