The Yerkey v Jones principle protecting surety wives is unavailable where the wife received substantial benefit from the mortgage transaction (here approximately $408,000 of a $680,000 facility). Under the Contracts Review Act 1980, where a wife was subject to undue influence by her husband in entering a mortgage but received substantial benefit, the court's power to avoid unjust consequences is limited to the amount exceeding the benefit actually received.
The full text is available to signed-in members, including the 7 later cases that cite this judgment.
1 of the 7 citing cases carry a classified treatment. How each court treated it is available to signed-in members.