If you are already in the UK on a visa, you can switch into this visa unless you are on:
- a seasonal worker visa;
- a domestic worker in a private household visa;
- a visit visa;
- a short-term student visa;
- a Graduate visa;
- a Parent of a Child Student visa;
- immigration bail; or
- have permission to stay outside of the Immigration Rules.
You are also not able to apply for this visa from the UK or abroad if you have already been granted a graduate visa or have come to the UK as a Doctorate Extension Scheme student.