I fully understand where Peter is coming from with this statement and I am certainly aware of the theoretical downside in allowing retrials after perverse verdicts but I feel that I must disagree.
There is one thing more important than the principles to which he so strictly adheres and that is uncovering THE TRUTH. We may appeal to longstanding traditions - Magna Carta, for example - only when these serve the public better than the alternative.
I have seen hundreds of 'Law & Orders' and cannot get my head around the US system which seemingly excludes evidence regularly on the basis that 'it is fruit of the poisoned tree'. I fully appreciate that this is aimed at protecting civil liberties but surely, JUSTICE in its barest state is even more important.I do not want our system to offer any comfort to the guilty. Only under a totalitarian state are there realistic dangers to the innocent.