Islands can be calm, quiet, isolated places where you can remove yourself from the stress of mainland life. Or, they can serve a more transactional purpose: a place to put people you don’t want to have around. Think Alcatraz, or Elba, where Napoleon was exiled.
Well, off the coast of Portsmouth, there are islands that were also used to remove and isolate certain individuals. Individuals who sometimes figured out novel ways to entertain themselves.