We started sole trader, should say I. Then went limited as a condition of a network we did work for. But as tax on dividends went down to only 10% made sense as well. We have now reverted to a partnership as the tax on dividends is virtually the same as income tax although it is going down to 18% in 2020. Being limited you have to run a PAYE scheme as you are classed as an employee, another headache not needed.