Public liability insurance, mainly for companies. Home insurance policies usually cover standard liability needs for householders.
An online insurance broker. They gather quotes for you and give you details of the cheapest one that meets your needs.
Public liability cover for small businesses. Online cover for up to 5 manual employees. Option to add employer liability. Links to other business insurances. 
An intermediary offering policies from insurers to cover business owners and tradesman, for defence against alleged negligence and compensation if liable.
Companies can risk some things - a loss because the quote was not high enough or unexpected vehicle costs. However, if something goes wrong and there is damage or injury to staff, clients or to a third party, claims can be huge. So liability insurance is really not one of the things you can skimp on.
Liability insurance is designed to cover you and your company for legal defence costs if you are accused of negligence that may cause injury or damage arising out of business activities and ito cover compensation if your business is found to be at fault.
Essentials to think about when you get liability insurance are the value of the insurance you need and the range of the cover you need.
We are not financial advisers
We are not financial advisers. We cannot give you advice on insurance policies, or which one to buy. We can only advise you to check prices and terms and to use your own judgment. If you do need advice, please speak to a qualified Independent Financial Adviser.
The value of the insurance may be dictated by the people you work for, especially if you work for a large company or an authority, as they usually specify how much cover you need to have. You can't work for them if you don't have it. Remember, too, that although most of the time you don't need to claim at all, if something does go badly wrong, and by accident someone is injured, the claims can be huge.
As for the range of cover, the most important thing is public liability up to a satisfactory total, so that your insurer can pay out if you hurt someone and are found to be liable. If you are an employer, you will also need employee cover so that they get compensation if you or your company are found to be to blame for an injury to them. Additional options usually include cover for the value of your own tools, tools you hire and for plant and materials.