After learning that platinum was discovered in 2017 on vacant land owned by Thomas, Lerato offered Thomas R1 million to buy the land. In 2020, Thomas accepted the offer and ownership was transferred to Lerato. Sometime in May 2023, the Exco Mine 9 Company notified Lerato that it owns a mineral rights licence and intends to commence mining activities on the land. Lerato is upset about it because she is of the view that the platinum underneath her land belongs to her. With reference to the common law principles and applicable legislation, analyse the validity of Lerato's view.