Mr and Mrs Banana own the fee simple absolute in possession in No.2 Equity Row. Mr and Mrs Date, Mrs Banana's parents, who also live at No.2 and are beneficiaries under a trust of land on the basis that they provided part of the original purchase price. The Dates used to live at the premises, but are frequently away for short periods of time visiting friends in other parts of the country. Mr and Mrs Banana are considering selling the property to Mr Fig. How would the beneficial interests of Mr and Mrs Date be protected