I would recommend you seek the advice of a mortgage broker – but as others have indicated, I don’t think much of your chances.
Effectively you are looking at a buy to let mortgage (although you will be living in the property).
5 years ago, mortgage providers would have been falling over themselves to accommodate you – believing that they were on to a winner, with the ever increasing property prices. Now that reality has set in, since there is no guarantee that the property will increase in value – they will be very unlikely to offer an interest only mortgage (with the ever present risk that you will walk away, leaving them with the debt).
Another major concern for any lender would be your ability to pay the mortgage should you not be able to find tenants for an extended period. As a student with no income, it is hard to see how you would begin to meet your mortgage obligations without tenants – but if you could show that you could cope for say 6 months, you might find someone willing to assist.