Benefits
If you receive benefits, you should speak to Jobcentre Plus to see how studying full-time will affect you - DirectGov is a good starting point for this information.
Only lone parents and disabled students retain eligibility for means-tested benefits such as Income Support and Housing Benefit while they are full-time students although this entitlement is affected by student funding (irrespective of whether or not the student loan has been taken up). This often means that in practice, most students do not get Income Support during the academic year, but disabled students and single parents may still receive Income Support during the summer months.
You may also be able to get a reduction in or exemption from Council Tax, depending on your circumstances, as full-time students are not ‘counted’ for Council Tax purposes.