Who instructs the Met who it should and shouldn't investigate?
The head of the Metropolitan Police, Sir Paul Stephenson agreed to the review at Teresa May's request so long as the cost didn't come from the Met's budget as far as I can see. I have no idea why the remit was restricted, but it seems to have been, otherwise why mention the abduction;
The investigative review is intended to collate, record and analyse what has gone before.
It is to examine the case and seek to determine, (as if
the abduction occurred in the UK) what additional, new investigative approaches we would take and which can assist the Portuguese authorities in progressing the matter. Whilst ordinarily a review has no investigative remit whatsoever- the scale and extent of this enquiry cannot permit for such an approach. It will take too long to progress to any “action stage” if activity is given wholly and solely to a review process.
The ‘investigative review’ will be conducted with transparency, openness and thoroughness.