I agree if these are proved to be children and are proved to have genuine family in Uk we should admit them , and maybe give preference to unaccompanied females( how many of them are there?)
But we should be aware that there have been several cases where the " child" is over 16, the " relative" in the uk is an unrelated " uncle" and the wider family follow. Many of the child refugees unaccounted for are already here in Uk, having entered illegally. I know I sound an old cynic, but having seen the photo of Alf Dubbs with the 2 "child" refugees who were taller than him, with stubble, I am unconvinced.