Honestly I don't know. The advice I've always been given is to advise my clients that they must notify their buildings insurance provider. I know that some insurance providers will void a policy if they find out that the same thing is insured with multiple providers, so I wouldn't take the risk even if I could find a policy that was suitable. You may need to spend the weekend digging around your filing system. Sorry.
Honestly I don't know. The advice I've always been given is to advise my clients that they must notify their buildings insurance provider. I know that some insurance providers will void a policy if they find out that the same thing is insured with multiple providers, so I wouldn't take the risk even if I could find a policy that was suitable. You may need to spend the weekend digging around your filing system. Sorry.