Commercial Insurance Policy UK Car Insurance; Can I Transfer My NCB From A Commercial Van To A Private Car Insurance Policy?

UK Car Insurance; Can I transfer my NCB from a commercial van to a private car insurance policy? - commercial insurance policy

I have a couple of years worth of bonus shares is not the policy of my past, which was a commercial vehicle, namely a small van. But now, I bought a real car and I can not believe how much my insurance would be if my NCB can not be considered.
Is it possible to run more than one private NCB? The driver is the same, after all.
Regards in advance.