Recovery of possession of land - Defence of adverse possession - Whether factual exclusive possession and intention to possess proven - Defence of proprietary estoppel - Whether there is evidence of assurance - reliance - detriment - Person in whom interest via proprietary estoppel resides is deceased - Estate not a party to the proceedings - Defendants are not personal representatives of the estate -Whether the Defendants can rely on the rights of the estate to remain in possession - Mesne Profits.