Post mortem held up by lack of identification plus lack of consent of next of kin. Add a possible dispute or request that created an inquiry, or more detailed further testing needed, toxicology etc. Whole thing can take many months. Also, bizarrely, recently a family member died suddenly and the death certificate was dated the date they were located and declared dead BUT they had been dead longer. The coroners office said that's how they do it nowadays, the date they were located, but I found that extremely hard to comprehend and believe.