Universities and SUs are generally very supportive and provide specialist help for a range of welfare problems. Check out what is on offer, from the university and your SU.
In general, students are not entitled to government welfare benefits unless there are other reasons – for instance, if you are a single parent. If you think you might qualify, get in touch with the Citizens Advice Bureaux. You can find your local CAB office on www.citizensadvice.org.uk or get online advice from their national service www.adviceguide.org.uk.