There really isn’t one….
The funding pays for the support rather than going directly to you and doesn’t have to be paid back. It isn’t means tested, there is no age limit on applying and you can apply as an undergraduate or postgraduate student. It doesn’t affect your general student finance application or your eligibility for any other funding sources. The process of applying has a couple of steps to go through but isn’t too bureaucratic and it isn’t difficult to get approved for the support you need.