If you don’t read this article your life will be the lesser for it.
Very conveniently, the yellow vessel had ‘Ministry of Defence’ and a telephone number stencilled on it, which was of course immediately called. What happened next was to become the stuff of legend. He was connected to the Royal Navy. “I have found your yellow submarine” said John. “We haven’t lost a yellow submarine” said the Navy. Which was an odd response as the evidence to the contrary was overwhelming.