Tourist visa
A UK visit visa allows a person to travel and stay in the UK for up to six months. It also covers people coming to the UK for business trips or medical treatment and those passing through the UK.
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Student visa
Applying for a UK student visa allows a person to come to the United Kingdom to embark upon a course of study in excess of six months duration.
The study visa immigration service entails the grant of a UK study permit enabling visa nationals to study in the UK with a view to gaining a recognized qualification.
Hope this helps.
Now my question; who will be the sponsor of your partner? You or her brother?