Hi Craig
You will need Employers Liability & Public Liability as a minimum, but I would suggest you get covered for other items such as misuse of telephones, theft, key loss, etc.
I use a broker local to me and he went through every item with me to make sure I was happy with the cover and the price before we went ahead.
If you want his details, let me know.
Cheers
Diane
www.freshlymaid.co.uk