Claim for an equitable interest – Proprietary estoppel – Promissory estoppel Claim for beneficial interest – Burden and standard of proof – Adverse possession against a party who no longer has title – Claim based on adverse possession – Whether claimant was a licensee - Whether the provisions of PROSA apply to disputed property – Proprietary/Promissory estoppel – Application for a declaration of spouse – Whether the deceased was a single man for the material period – Credibility of witnesses – Costs – The appropriate costs order to be made in respect of these matters