You can, depending on your circumstances,

You need to be "officially" studying or working less than 16 hours per week, this depends on how many credits you're studying towards, check with your uni what the official quota of hours attached to the module, this is not just simply the hours you are in class but the study hours allocated to your module(s), also you need to be actively looking for and prepared to accept full-time work.

That is my understanding anyway, see this doc for more info and contact numbers, you should just phone and enquire they will usually be quite helpful:

http://www.jobcentreplus.gov.uk/JCP/stellent/groups/jcp/documents/websitecontent/dev_015482.pdf

Thanks, Matt.