The perished crew members remain in the cockpit until the seating positions (who was sitting where) and the switch positions (was this turned off or on or what was the throttle position?) can be verified and recorded for the investigation.
It's unlikely that the majority of some of the switches levers would move even on a major impact, as they are generally gated??? Not a 737 pilot but I guess this would be the case.
I would guess the investigators will look quickly at the cockpit to allow removal of the deceased.
Nice to see Sky had a decent 'expert' on earlier, but the talking head still managed to make an arse out of her interview. (ie, the crew won't be able to give a factual report of the crash now will they!!!) Where do they get these numpties?