i understand the argument against a jury full of experts, but for reasons i mentioned is it always safe to have an all lay jury?
I think in the vast majority of cases a lay jury is OK because there are not any complex technical issues involved. However in more complex cases where it is necessary for the jury to get to grips with detailed scientific or accounting evidence I can see the argument from having one or two on the jury with relevant expertise, as Cliff has suggested.
Is this not already catered for by the fact that both the defence and prosecution can call experts to explain particular points? Having been explained by either side the Jury can then choose what they believe.
If the defence or the prosecution experts can't convey their opinion to the Jury then that's their problem, the experts for either side can also then be cross-examined by the opposition to question their opinions.
I'm not sure that hand picking experts to sit on a Jury would help, it didn't help when three Judges sat effectively as the Jury for the 2002 appeal.