Good luck, but nothing will happen until the security services are prised open.
The big questions that will lead to the big answers are: why did the UK security apparatus go immediately into overdrive? Who instructed them? What was Gordon Brown’s role? What prior connections existed between the security services and the parents/their friends/others in/around Praia da Luz at the time of Maddie’s disappearance?
Awkward and uncomfortable questions for the UK State, but regular police work will get nowhere.