'The gun was found at George's home in Fulham, London, after his arrest in 2000, the jury was told. The gun was of a type which, if converted, could have been used to kill Dando, the prosecution said. George, who denies murder, claimed to police that the gun in the picture was a replica, although he said it was capable of firing blanks.'
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So he did have a gun at his house. Maybe the murder weapon.
I do not see how the item of gun shot residue in his jacket is relevant. To either side. George could simply say, yes I have fired guns before. In the park, aiming at trees.
Whether the gun in the picture was just used for firing blanks is neither here or there. What is more important is the gun in his property.