Bedknobbs And BroommSticks (1971)

Set in wartime England, Eglantine Price is a would-be witch who hopes to use her newly acquired conjuring powers to forestall a Nazi invasion. Saddled with three surly kids who've been evacuated from London, Lansbury wins over her charges by performing various and sundry feats of magic. And, yes, she manages to foil a few Germans along the way.