If you already have separate breakdown cover, you could get it removed from your policy, or remove it from your van insurance quote, to reduce payments.
Even if you haven't had insurance in your own business name before you could save money, as some companies offer an introductory discount.
Making a claim will not automatically lose you your no claims bonus. Most insurers will relegate you only two years meaning if you had 5 years no claims then you would still have 3 years.
Remember any claim made against your insurance company will affect your no claims discount and could lead to higher premiums.
We have a list of various providers of motor insurance who will supply you with quotes that won't cost the earth.