Now, to the crux of the matter...
Whilst Cook the crook still had possession of the silencer, he sent a hand written memo to Fletcher at the lab' asking him if the silencer could have been warped after receiving a hard knock, because bullets being fired through it were becoming damaged...
What this implies in the stronget possible terms is that before Cook arranged for the rifle, silencer and control ammunition to be sent along to the lab' that he had already joined the silencer in his possession to the gun barrel of the rifle, and had fired control bullets through the silencer which were damaging them, leading him to believe that the silencer must have received a hard knock and become damaged...
Essex police did not inform the prosecution that Cook had done this prior to the rifle, silencer and control ammunition had been sent to the lab'. If the defence had known this by the time of the trial it would have made a significant difference to the acceptibility or admissibility of the blood based silencer evidence having allegedly got into the silencer by backspatter in keeping with Fletchers claim. Fletcher knew full well that the silencer had been attached to the barrel of the rifle and that control rounds had been fired through it on an occasion before he himself had carried out the official test fire of the same between 20th September, and 2nd October 1985, because lab' records confirm that Fletcher had carried out comparison tests of markings found upon unofficial test fired founds, against markings on several crime scene rounds, on dates before the 20th September 1985...
How could Fletcher have carried out comparison tests before the start of his official test fire (20th September 1985), on the following dates, if he performed specific comparison tests on 12th, 13th, 18th and 19th September 1985?