To all those saying what's the point in getting it if you don't need it, read this. A top paying savings account will pay 6%+, which is going to be £180 on 3K. The interest on your loan will be much less, say around 3%, or £90. That's £90 pure profit on a year's loan.
Plus, you don't even need to start repaying until you earn over 15K. In addition, say you underestimate your spending, and you find yourself in the hole after uni? That 3-4K for three years will be almost 12K when you finish. Where are you going to get money if you don't find a job right away after graduation? Borrow it? Yeah right, for a graduate who's never had a job, or other credit, you'll be looking at high enough rates then.
Marcus