I wonder how much was used of that £12+ million pursuing the alleged burglars who had sod all to do with it and ended up being right back at the start.
Many, many more than the "alleged" burglars have been interviewed by Operation Grange and in my opinion you cannot possibly have any knowledge of exactly where any of those interviews led the investigators.
What we do know is that there is justification for pursuing the active case into Madeleine's disappearance as the investigation asked for money to keep going on it, the money was granted and work continues. The PJ also appear to have an interest in something or other too as the Portuguese investigation continues.
Just an aside ... one wonders how the Portuguese Penal Code copes with Freedom of Information Requests ... or does the secrecy law ensure that their police are allowed to pursue active criminal cases without the hindrance and added expense of having to dot the i's and cross the t's of such requests?