If you have immigration permission that allows you to work, you do not need to get any further approval.
An employer must check that your work condition permits you to do the job for which you have applied. The Home Office calls this a right to work check. An employer must conduct this check in a way that does not discriminate against you.
You will need to get a share code to prove your immigration status to your employer. Your share code is valid for 90 days and you can use it more than once during that period. The code must begin with 'W'.
Once you’ve received this code, you will give it and your date of birth to your employer so that they can conduct an online check. If you cannot get a share code, talk to your employer.
If you are waiting for a decision on your application, or you have applied for administrative review, your employer can use the Employer checking service to confirm your status. They must wait for Home Office approval before you can start work.
Your employer will also need to see information about the term dates for your course. This information can be in any format. For example, dates from your sponsor's website, an email to you or a letter to the employer.
If you are doing a work placement, your sponsor must provide details in a letter to your employer.
Sometimes, employers must also conduct criminal record checks before you can start work.
You may want to refer your employer to information about how to carry out these checks for international students.