This is a link to Swansea Student Services'  information page about visa extensions within the UK, visa (entry clearance) correction, police registration, visas for other countries and visas for families.

The links to UKBA here give the policy guidance if you are coming to the United Kingdom as a student under tier 4 of the points based system, and should be read with paragraphs 245ZT to 245ZZD of the immigration rules.

http://www.swansea.ac.uk/study/current/StudentSupportServices/ISAS/Immigration/