Companies Act - Sections 174,193, 213 and 213A - Mining lease granted to 1st Defendant’s son - Duty of director – Whether breach of trust - Whether implicit agreement to permit 1st Defendant to make such a decision - Whether 1st Defendant as managing director acted lawfully - Whether duty to disclose - Whether secret profit – Expert report admitted by consent - Whether Defendants entitled to challenge the expert’s methods and findings – Remedies - Measure of damages.