Why do so many people think it's the BEA's job to dance to the tune of the popular press?
Perhaps it's because the job of the BEA is to collate what facts they can and come up with an initial findings report ASAP based upon the factual information garnered from the scene of the accident in the event that the accident/incident was caused by a mechanical/systems failure that might have an affect on other aircraft of the same type.
Obviously in this case the accident was on 'home soil' so to speak with a huge media circus surrounding it and extreme pressure on the investigators to produce some form of 'reason' behind what was a quite baffling scenario.
What the BEA or any other organisation should not do is 'leak' tidbits of information without robust investigation behind them.
All IMVHO of course.