I know someone who covered both his trials for national media and has covered all the big cases in Lewes as well as sussex related cases at the Old Bailey and he reckons that Jenkins' being a free man is the biggest miscarriage of justice in modern times.
I know the police do (regularly) get things wrong and can be myopic in certain instances (they are supposed to investigate all avenues that point to or away from the suspect but in many cases don't) but I don't believe this to be one of those cases.
How about the Rottingdean mother-in-law murderer ? How a jury failed to convict him I do not know.