Cat B car back on the road and for sale?

As a motor dealer of repute with over 35 years in the business, and at the top end of the scale i say this, Joe Horner is indeed correct, the codes for Cat B are indeed voluntary between insurers, and D.V.L.A. and their is "no written law" to say a Category B vehicle cannot be returned to the road, the reason so very few actually are is because they are usually so extensively damaged and regular every day vehicles that it is simply not worth the cost or time to reinstate. However ..... in the case of say a Top of the range Mercedes, Ferrari, Porsche etc: the very value of the vehicle itself may deem it to be worth repairing to the highest of standards, indeed as i write this in August 2018, a 2012 new generation Porsche 911 Carrera is being advertised on Ebay motoring for £30,000 (over half the price cheaper than a non damage example) and is Insured, Taxed, and MOT'd and being used daily .... I am always amazed at so called "online" experts who pass on heresay information without actually checking the legality of such facts, whether you agree or not is immaterial, You CAN, should you so desire return a Cat B to the road, and yes, Adrian Flux WILL i insure it, none of it will be completely straight forward as so few people really understand the law surrounding this process, but the question started out as as "Can You return a Cat B to the road " .....well the real answer if you want to be completely within the law, but outside of most people's comprehension as to why you would ? ....is a Yes.....half price Porsche anyone ?