International students on Student Visa are not eligible to start a business while studying. However, you can still develop your business idea alongside your studies by accessing some of the support listed above. Once you graduate, some options are available to you whether you are looking to start a business in the UK or elsewhere.
For guidance on working, becoming self-employed or setting up a business after completing your studies, please refer to:
http://ask.herts.ac.uk/business-start-ups-enterprise