If you are a 'visa national', you must apply for an STSV in your country of residence before you travel to the UK.
You should apply using the online visa application form on the UKVI website.
You must also supply the following documentation, including any translated documents where necessary:
If your STSV application is successful, you will receive a visa sticker/vignette in your passport for six months.
If you are entering the UK on an STSV:
If you arrive to study for one term at Regent’s as part of an exchange/study abroad programme on an STSV, and then decide you wish to complete a second term at Regent’s, you will not be able to extend your current STSV inside the UK.
You must return to your country of residence and apply for a Tier 4 student visa for the second term. You cannot apply for two consecutive STSVs, this is not permitted by the UKVI.
If you complete a pre-sessional English course on an STSV, you must return to your home country to apply for a Tier 4 (General) student visa before you can continue to your degree programme.
There is an option to request a single Confirmation of Acceptance to Study (CAS) to cover the pre-sessional English course that allows you to apply for your new Tier 4 visa to study the degree-level programme from within the UK.
However, you must ensure that you fulfil the Tier 4 requirements if you want to use this option.