insuring a sorn'ed car

[motorsportbeng]

I had a fiesta road car to get me to and from uni which I took a years insurance policy out on last summer. my road tax expired on it recently so I decided to sorn it at that point and it now is the basis of my race car project. At the moment I am searching for a road car so I am keeping my insurance policy going on the sorn'ed fiesta until I buy another road car to transfer the policy onto. I have spoken to 2 different people at my insurance company and had a google search and it is ambiguous as to whether I'm allowed to do this or whether it breaches the new road tax and insurance laws. If someone could clear it up it would be great! thanls