The Longman warning does not require any particular formula or the words 'dangerous to convict'; adequacy depends on whether the warning sufficiently conveys the danger of convicting on uncorroborated evidence after long delay. In oath-against-oath sexual offence cases, a trial judge may comment on the question of the complainant's motive to lie, provided the jury is not left with the impression that the accused bears any onus to establish such a motive or that the absence of a perceived motive justifies acceptance of the complainant's evidence. Palmer v The Queen is confined to the impermissibility of cross-examining the accused about the complainant's motive to lie.
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