If you are 16 or over and want to study at higher education level, you’ll need to apply for a Tier 4 (General) student visa.

You need to wait until you have an offer from a university or college before applying for your Tier 4 (General) student visa. Your university or college will then be able to give you a document called a Confirmation of Acceptance of Studies (CAS). To do this, your chosen institution needs to be approved by the UK government as a ‘licenced Tier 4 sponsor’.

Visit this link for more details:

https://www.britishcouncil.in/study-uk/student-visa-uk