To come to the UK as a student you will have to produce the following documents :

-->A passport
-->A letter of unconditional acceptance for a full-time course
-->Evidence of your ability to meet, without working in the UK, the costs of your course, accommodation and maintenance and to support any dependants accompanying you.

Student visas are normally granted for an initial period of one year, usually determined by the length of the course to be studied.

When you arrive in the UK, an immigration officer may question you, so take all relevant documents in your hand luggage.(esp with all eduational documents and an Chest X-Ray is must @london airport)

You may take part-time or holiday work but you must not:

-->work for more than 20 hours per week during term time unless your placement is part of your studies, has the agreement of your education institution and leads to a degree or qualification awarded by a nationally recognised examining body
-->do business, be self-employed or provide services as a professional sportsperson or entertainer
-->work full-time in a permanent job

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