Document Checklist

You will need these 8

Every application needs these. A missing one is the commonest reason an application is returned.

Passport or valid travel documentCurrent passport or other valid travel documentation. Must be linked to the UKVI account for the eVisa. National GOV.UK page, not Bangladesh-specific.
Source https://www.gov.uk/student-visa/documents-you-must-provide
Confirmation of Acceptance for Studies (CAS)CAS from a licensed student sponsor (course provider). Course fee amount is shown on the CAS.
Source https://www.gov.uk/student-visa/documents-you-must-provide
Application feeGBP 558 to apply from outside the UK, plus GBP 558 for each person who joins you.
Source https://www.gov.uk/student-visa
Immigration Health SurchargePaid as part of the application; amount depends on visa length (no figure on the page).
Source https://www.gov.uk/student-visa
Proof of course fee moneyEnough money for 1 academic year of course fees (up to 9 months), as shown on the CAS.
Source https://www.gov.uk/student-visa/money
Proof of living costs (financial requirement)GBP 1,529 per month (up to 9 months) for London courses, GBP 1,171 per month outside London. Funds held for at least 28 days in a row, with the 28-day period ending within 31 days of the application date. Extra funds for each dependant. Bangladesh is not on the differential-evidence country list, so evidence is expected.
Source https://www.gov.uk/student-visa/money
English language proofDegree-level or above: CEFR B2; below degree: B1. Routes: UK school qualification, UK degree, degree taught in English from outside the UK (Ecctis assessment code), or a Secure English Language Test (SELT) from an approved provider. Higher Education Providers can assess B2 themselves.
Source https://www.gov.uk/student-visa/knowledge-of-english
Identity verification and biometricsProve identity at a visa application centre (fingerprints and photo) or via the UK Immigration: ID Check app where offered. Processing starts after this step.
Source https://www.gov.uk/guidance/visa-processing-times-applications-outside-the-uk

If it applies to you 7

Required only in certain cases, such as a sponsor, a study gap, a dependant or a particular course.

Student loan or sponsorship evidenceIf funds come from a student loan or financial sponsor, evidence from the loan or sponsorship company.
Source https://www.gov.uk/student-visa/money
Tuberculosis (TB) test certificateRequired if coming for 6 months or more and you lived 6+ months in a listed country within the last 6 months. Bangladesh is on the listed-countries page. Chest x-ray at an approved clinic; certificate valid 6 months from the x-ray date.
Source https://www.gov.uk/tb-test-visa
TB listed countriesBangladesh appears in the official list of countries where a TB test is needed to enter the UK.
Source https://www.gov.uk/tb-test-visa/countries-where-you-need-a-tb-test-to-enter-the-uk
ATAS certificateNeeded if the course and nationality require it (masters level and above in certain subjects).
Source https://www.gov.uk/student-visa/documents-you-must-provide
Financial sponsor written consentWritten consent for the application if you received sponsorship for course fees and living costs in the last 12 months.
Source https://www.gov.uk/student-visa/documents-you-must-provide
Parental consent and relationship proofIf under 18: written consent from both parents or legal guardians (or sole-responsibility parent) covering visa, living and care arrangements and travel, plus birth certificate or government document showing parents' names.
Source https://www.gov.uk/student-visa/documents-you-must-provide
Additional documents by circumstanceGOV.UK says further documents may be needed depending on circumstances; the full list is in the Student visa caseworker guidance (not opened).
Source https://www.gov.uk/student-visa/documents-you-must-provide

Document checklist for United Kingdom (Master)

You will need these 8

If it applies to you 7