In my opinion the implication embedded in the thread title is that under 'normal' circumstances when a child disappears, local British police aren't up to carrying out the investigation adequately.
I doubt that the review of any investigation conducted into a missing child case in Britain would reveal the volume of evidence which had been ignored by the original investigators.
The Policia Judiciaria carried out an independent review of Madeleine McCann's case several years down the line and found witnesses who had not been interviewed when the child went missing and enough evidence to re-open the case as an abduction in accordance with Portuguese law.
Scotland Yard's review of the circumstances of the case similarly found enough evidence which had been ignored to justify reopening ... and they too adopted the abduction theory based on that analysis.
I would not expect any force in Britain to make the volume of omissions that these two independent reviews uncovered in Madeleine's case which in my opinion confirmed the mismanagement under which it was originally conducted.
Therefore I do not believe that Scotland Yard setting up a special unit would be of benefit.
What I do think would be of great benefit would be for SY to be allowed exactly the same leeway expected, demanded and enjoyed by the PJ to get on with the job without let or hindrance ... and for amateur detectives to allow them to proceed with the last stages of what has been a monumental task ... the like of which I hope will never be necessary ever again.
