Yes, quite agree with youngmaf.
Tragic as it is, I think the McCanns must now accept that they will not see their child again. Even if she is still alive she will now be eight years older and will remember little or nothing of her early life.
Whatever "special fund" this investigation is resourced from, it is taxpayers' money ultimately and I think someone should call time. Unless, that is, the McCanns want to fund further investigations themselves. There have been no credible suspects, no lengthy leads and the case is no closer to being solved now than it was eight years ago.
Readers may also be interested to see, from the BBC report, the aerial photo of the locations involved. They might like to consider whether the McCann's contention that leaving the child alone so as dine where they did "was no different to eating dinner in your back garden". Does not justify her abduction, I know,, but an interesting thought all the same.