Morning Roch
I agree many people know the truth of the happenings at WHF does Jeremy Bamber know the truth I guess only he knows that had EP known the truth they would not have had to fabricate evidence if indeed they did 
Bridget used to suggest that JB knew the truth of what happened and was enaged in a game of picking apart EP's genuine mistakes in a bid to win freedom. If I twisted what Bridiget expressed and threw in a dose of reaslism about police corruption that I always accused Bridget of not facing up to, the above would be changed to
'JB knew the truth of what happened and therefore was engaged in a game of picking apart EP's mistakes, corruption and scene staging to win his freedom'.
This would mean nobody is a winner, just like DB stated. Not EP, not the relatives, not JM and certainly not JB. However, the first three would gain more empathy in general (than they are currently afforded).
But for me it comes back to the TFG op, the TFG officers opinions, the early dynamics around DCI Taff Jones, ACC Simpson, right at the beginning. That's were I've been led to believe the truth is somewhere lodged. I could be wrong of course.