What are facts about case Guinness plc v Saunders 1990?

Guinness plc v Saunders [1990] is a landmark case in UK company law concerning the duties of directors and the principle of "proper purpose." The case involved the acquisition of Distillers Company by Guinness plc, where directors were accused of using their position to manipulate share prices to benefit their own interests. The House of Lords ruled that the directors had breached their fiduciary duties by acting for an improper purpose, leading to significant consequences for the individuals involved. This case is often cited in discussions about corporate governance and the responsibilities of directors.