If this is your hope then you should consider checking yourself in to be sectioned under the mental health act, because pursuing this line is tantamount to self harm. Criminal charges against directors are unheard of.

There is just no way that the directors assets will be seized. Sorry. Whatever is theoretically possible under UK law, it doesn't change the fact that this is virtually never ever considered an option by authorities.

At the end of the day this is just so so unlikely to get to criminal proceedings against the director, either it was a scam all along in which case he is long gone, or it wasn't and he has nothing to worry about other than irate ex-customers from his old company.