Even if you don't inform the company of a significant change, they may refuse to fulfil your obligation to the UK insurance market, getting cheap motor trade insurance.
Some companies are also very relaxed with many possible payment options 
to lessen the burden on the policy and financially cover aspects of the business.
Such companies shave experienced staff motor <a href="http://petshealthwebsite.com/groups/simplifying-straightforward-motor-trade-insurance-programs/" rel="nofollow">traders insurance</a> and can provide you with a number of options of policies.