If one of my employees, through their intentional actions, devalued one of my assets to the tune of a few £M, I would absolutely have them in court. Especially if that employee had significant assets of their own for me to chase.
The way in which courts decide whether this is a simple mistake made in the course of employment or a recoverable action is to look at whether their actions are in the normal course of their employment. As an example, if Son went into a dangerous tackle and injured himself until the end of his contract, that's not recoverable (although we'd be insured to some of the value). If he decides to go and play army for two years, knowingly lowering the value of one of our assets - that is.