It's important to understand the differences between a hobby and a business for tax, insurance and legal purposes.
Key questions to consider:
- Is the activity being undertaken for commercial reasons?
- Is your main intention, purpose or prospect to make a profit? Do you regularly and repeatedly undertake your activity?
- Is your activity planned, organised and carried out in a businesslike manner?
If you answered yes to most of these questions, you're likely to be running a business, although it depends on your individual circumstances.