As the Battle of Britain raged the UK government prepared for the worst. Included in those preparations were a series of posters dealing with the invasion threat. Two of them received wide distribution; the third, to be released only after the Germans had landed never saw the light of day until recently when a bale of them were discovered and some enterprising soul saw a unique marketing opportunity. It is 'hot property' over here.
Some might think it represents sage advice for Phil Goff.