Which IELTS test do I need if I am applying for a UK visa?
If you are applying for a UK visa in the UK, there is an IELTS test for
you. For visa applications to the UK, you may need to have an English
language qualification. In particular, for many categories of visa, you
must submit an English language qualification which is included on
the UK Home Office’s list of Secure English Language Tests (often
referred to as SELT tests). IELTS and IELTS Life Skills are on this list.

Can I use any IELTS test result for a UK visa application?
If you wish to use an IELTS test result as part of your application to
UKVI – apart from some types of student visa – you may need to take an
IELTS for UKVI or IELTS Life Skills test.