As SKINR planned earlier in Current Science article, a physicist team linked to CERN made very interesting measurement on PdD/H loading, that may be key to PdD LENR understanding.
They implanted some atoms in palladium, to probe some nuclear characteristic (Perturbed Angular Correlations). They found some spectrum common to H and D loading, but one spectrum is specific to D loading, and is elusive. They suspect it is a coherent distribution of D atoms around some probe atom. This spectrum is specific to deuterium loading and in only observed in some loading phase, looking like the elusive LENR phenomenon.
Does it gives key directions ? Correlated states match prediction of many theories...