Check whether you need a student visa to study in London before you apply for a course at any of the art colleges. If you're from outside the European Union, you're likely to have to apply for a visa for the duration of your stay in the United Kingdom.
Check out the Universities and Colleges Admissions Service's (UCAS's) website. UCAS handles all higher education applications in the United Kingdom; you have to apply, pay your fees and update your details through this organization.
Prepare an art portfolio in the field of study you'd like to pursue. Contact the schools you want to apply to and ask the college's international center to send you additional information about their courses and what their application criteria is. Portfolios are an important part of your application because they showcase what you know, so prepare them with extra care.
Ask at the international center when the term starts. There are three terms in the UK: Autumn, Spring and Summer. The Autumn term generally extends from September to December, the Spring term is from January to March and the Summer term is from April to June. It's important to know when the semester starts in London because there may be an overlap with semesters in other parts of the world, so you may not be able to do an exchange.
Study art in London by attending night classes at community centers. This is a cheaper option than attending a university course. All class fees depend on the individual colleges and universities, so inquire at the international centers of the individual institutions about them.
Study art through distance learning. If you have a full-time job and can't study art full time, you can apply for distance learning. Ask colleges to send you instructions for your field of study through the Internet or by mail. Distance learning allows you can learn art at your own pace and time.