Where there is a fatality there has to be a coroner's inquest for which every scrap of detail must be gathered. Remember the last time you got stuck in traffic because the road had been temporarily closed? Almost certainly a fatality involved. In this instance I think the coroner's inquest will open quite soon so that the human remains can be released but then adjourned until the AAIB have done their stuff and issued their final report. For those that don't know the AAIB will conduct an investigation that will forensically examine the entire flying and medical history of the pilot and the entire history of the aircraft as well as examining the weather, routing and any other relevant subjects.