Just watching a female pilot on Sky news saying that having spoken with colleagues the most likely scenario is that the aircraft commenced a turning manouvre and the wing flexed beyond tolerance leading to structural failure, or that a short circuit started a very intense and fast spreading cockpit fire. Im sorry but where do they get these people from?
From here perhaps? But being serious, those people are asking about the lack of ELT signals, just think back to the crash of Air Inter 148 where the ELT was destroyed on impact, they aren't indestructible......