The UK Border Agency published the following ‘Tier 4 Student Visa change’ announcement on its website earlier this week:
From 22 February 2010, any student who applies by post or at one of our public enquiry offices, to study in the UK under Tier 4 of the points-based system must possess a confirmation of acceptance for studies (CAS) from their prospective sponsor.
You will not be able to apply under Tier 4 using a visa letter from that date, even if the visa letter was issued before 22 February 2010.
Until 21 February 2010, you can continue to apply under Tier 4 using a visa letter, even if your course of study will start after 22 February 2010.
For more information about applying to study under Tier 4 of the points-based system, see the Studying in the UK section of the UK Border Agency website. Source: UK Border Agency.