In British political life, money and law have always moved in uneasy proximity — and Reform UK's record £72 million in donations has brought that tension into sharp relief. The party received the funds lawfully under existing rules, yet Parliament is now weighing legislation that could rewrite those rules and reach backward to reclaim what was already given. It is a moment that asks an old question in a new register: when a society decides that something should not have happened, how far back does its remedy travel?