"25. Further, it is clear from the recent jurisprudence that the Strasbourg Court will expect national authorities to apply article 3(1) of UNCRC and treat the best interests of a child as 'a primary consideration'. Of course, despite the looseness with which these terms are sometimes used, 'a primary consideration' is not the same as 'the primary consideration', still less as 'the paramount consideration'. Miss Joanna Dodson QC, to whom we are grateful for representing the separate interests of the children in this case, boldly argued that immigration and removal decisions might be covered bysection 1(1) of the Children Act 1989 : 'When a court determines any question with respect to – (a). the upbringing of a child; or (b) the administration of a child's property or the application of any income arising from it The child's welfare shall be the court's paramount consideration.' However, questions with respect to the upbringing of a child must be distinguished from other decisions which may affect them. The UNHCR, in its Guidelines on Determining the Best Interests of the Child (May 2008), explains the matter neatly, at para 1.1: 'The term 'best interests' broadly describes the well-being of a child... The CRC neither offers a precise definition, nor explicitly outlines common factors of the best interests of the child, but stipulates that: the best interests must be the determining factor for specific actions, notably adoption (Article 21) and separation of a child from parents against their will (Article 9); the best interests must be a primary (but not the sole) consideration for all other actions affecting children, whether undertaken by public or private social welfare institutions, courts of law, administrative authorities or legislative bodies (Article 3).'"
"26. This did not mean (as it would do in other contexts) that identifying their best interests would lead inexorably to a decision in conformity with those interests. Provided that the Tribunal did not treat any other consideration as inherently more significant than the best interests of the children, it could conclude that the strength of the other considerations outweighed them. The important thing, therefore, is to consider those best interests first. That seems, with respect, to be the correct approach to these decisions in this country as well as in Australia."
"46. It is a universal theme of the various international and domestic instruments to which Lady Hale has referred that, in reaching decisions that will affect a child, a primacy of importance must be accorded to his or her best interests. This is not, it is agreed, a factor of limitless importance in the sense that it will prevail over all other considerations. It is a factor, however, that must rank higher than any other. It is not merely one consideration that weighs in the balance alongside other competing factors. Where the best interests of the child clearly favour a certain course, that course should be followed unless countervailing reasons of considerable force displace them. It is not necessary to express this in terms of a presumption but the primacy of this consideration needs to be made clear in emphatic terms. What is determined to be in a child's best interests should customarily dictate the outcome of cases such as the present, therefore, and it will require considerations of substantial moment to permit a different result."