which act made the child’s welfare the paramount concern in decision-making?

The act that made the child's welfare the paramount concern in decision-making is the Children Act 1989. Specifically, Section 1(1) of the Children Act 1989 establishes the "paramountcy principle," which states that when a court determines any question regarding the upbringing of a child, the child's welfare shall be the court's paramount consideration. This principle ensures that the child's best interests take precedence over all other considerations in legal matters concerning their care and upbringing.