None. It’s not a loan. The similarity between an ISA and student loan lies in the fact that you are committing to paying back the lender via an agreement with fixed conditions. Our model in other aspects, bears no relation to a student loan.
The most pronounced difference between an ISA and student loan is that you do not have to pay if you do not earn enough. In other words, if you do not succeed after graduation, then we assume financial responsibility and consider the ISA an unsuccessful investment. This is proof of just how much we trust that only high-achievers in their fields get through our admissions process.