I understand the point you are making Hartley but with respect I think you are approaching this in the wrong way. The Court of Appeal in 2002 made certain findings of fact based upon the evidence they heard. That, together with arguments presented by Counsel, is what they based their findings on. If 10 years later further evidence comes to light which points towards a different conclusion they have to consider that new evidence and revisit the conclusions reached in 2002. The Court of Appeal would not say that since they made certain findings of fact in 2002 they are bound by those findings.
No, that's not what I mean, I fully appreciate that they would, if required, look at the contamination of the silencer again, but what I am saying, is, that if nothing has changed, then a fresh look would (should) come to the same conclusion, should it not?