This article explains who needs to register with the police upon arrival in the UK.
The Immigration Act 1971 requires that certain foreign nationalities aged 16 years or over must register with the police upon arrival in the UK. Students from the following countries are required to register with the police:
How do I know if I need to register?
It should say in your visa if you are required to register with the police. If it says you are required to register, but your nationality is not on the list above, please see one of our International Student Advisers.
If your nationality is on the list, but it is not specified in your visa, you do still need to register. Our International Student Advisers can give you guidance on this.
How do I register?
See this article on how to register with police.