If you are travelling to the UK to study from outside of the European Union you will need to apply for a Visa
Short Term Study Visa
Aged 18+ years
English Courses (up to 11 months only)
Other courses (up to 6 months only)
Tier 4 Child Visa
Under 18 Years
Longer study courses
Requires a CAS (Certificate of Acceptance for Studies)
Usually completed in 3 weeks but may take longer
Requires financial and personal information
CAS
Your chosen school will create a CAS for you and once this has been produced (up to 6 months before you travel to the UK) you are able to apply for a Tier 4 Visa.
Resources
This link will allow to access all the relevant government information about applying for a Tier 4 VISA.
For more student focused information about the Visa application process, please do also visit https://www.ukcisa.org.uk/Information–Advice/Visas-and-Immigration/Student-immigration-the-basics
It offers lots of helpful and practical advice about the Visa application process and the information on the site is kept fully up to date at all times.
For information about a Tier 4 Child Visa, please visit here.