Your Cleaner is most probably an Employee
Most people pay their Cleaners in cash without realising that they might be breaking the law and could incur PAYE, Income Tax and National Insurance Contribution Liabilities going back for 6 years, plus interest and penalties. This can often amount to a considerable amount of money and many people think that it is a remote danger. However, increasing Government action against all forms of benefit fraud are making this a much more likely reality.
Not everyone will be caught but you should think about solutions to this carefully.