In this day and age, I wouldn't put it into adult. I would use it for a downpayment on another buy-to-let property.
Buy it, and have a property management company let it for you (Guaranteed rent even if tenant doesn't pay - Costs 10% of rent) and use the rent to make the mortgage payments on the remainder.
Property value goes up faster than interest on money in the bank and the house pays for itself
Thats what I would do today anyway