Children Act 1975 (UK) said for the first time that the welfare of the child was to be the first consideration, but shift towards adoption as the means of achieving this - demonstrating the impact of the earlier Rowe and Lambert study.
For analysis of this legislation, see article by Sonia Jackson, Children Act 1975 (UK) Parents' Right' and Childrens Welfare, British Journal of Law and Society, Vol. 3, No. 1 (Summer, 1976), pp. 85-90.