Below are the general requirements a student needs to have fulfilled before applying for a visa to study in the UK:

• Valid travel document (Passport, copy of all pages)
• Confirmation of Acceptance for Studies (CAS) from your higher education institute
• Passport-sized photograph according to the ICAO criteria (colour photograph, size 3.5 x 4.5 cm) not older than 6 months
• Proof of sufficient financial means to cover the living costs for 12 months in advance. This can be done with presenting either a bank statement spanning last 6 months, or a proof of employment (including salary slips for last 6 months). As of 2023, living costs are set as:
  • £1,334 per month (for up to 9 months) for courses in London
  • £1,023 per month (for up to 9 months) for courses outside London
  • You must have this money for at least 28 consecutive days. The end date of the 28-day period must be within 31 days of the date you apply for your visa.
• Your tuberculosis test results
• Proof of language proficiency (IELTs etc.)

These are general requirements. And depending on individual cases you may be expected to fulfil additional requirements. You can also visit UK government’s student visa page for detailed information as per your individual case