Personally I think you just have to look at the number of miscarriages of justice we've had in the past to see why it can be a bad idea. We'd have killed the Guildford 4 for example.
People say, that's a long time ago, but look at the american model- 9 people were exonerated and released from death row in the last year in the states. These are people who'd all been "proven" guilty, and we're not talking about reductions of sentence, but full acquittal or dismissal of charges.
You can say "Only for those who we know are guilty". We knew the Guildford 4 were guilty, and the judges knew those US death row cases were guilty, and yet they weren't.
I suppose I wouldn't be strongly against the idea if I was convinced as to the infallability of british justice. But nothing's infallible.


