It might not, but a transistor radio would.
How silly of the Police and Prosecution to have overlooked that!
Must be because there was no evidence for it, or some other reason rendering it irrelevant/impossible.
"Suffice it to say that we are not concerned here with suspicion, however grave, or with theories, however ingenious..."R v Wallace 23 Cr App R 32
The Presumption of Innocence has been an Englishman's birthright for centuries and now belongs to everyone in the world. Theories or suspicion don't cut it, to displace that, I'm glad to say.
"Everyone charged with a penal offence has the right to be presumed innocent until proven guilty according to law in a public trial at which he has had all the guarantees necessary for his defense." Universal Declaration of Human Rights [1948], Article 11