I think SY will have learned a hard lesson at the British taxpayers expense on how not to solve a case by proxy in a foreign country. They still have to work out their end game because at nearly £12 million there will be questions to answer.
The first question being, on what basis did DCI Redwood undertake digs in Praiua da Luz prior to his departure?
I think it is money well spent - as even if Madeleine isn't found - at least her parents know that everything that could be done has been done and don't have to spend the rest of their lives wondering if some vital piece of evidence was missed because of an investigation disadvantaged by having no official protocol/procedures in place on how to deal with such cases.
If the investigations have resulted in greatly improved knowledge and/or new methods which can now be implemented which improve the chances of recovering a missing child - then as a taxpayer that's fine by me.
£12m is peanuts in the scheme of things imo. Just In London alone it costs taxpayers
£100m per year to remove graffiti.
AIMHO