‘Fairyland and its Fairy Kings and Queens’ is a review article of a collection of essays examining the responses to the death of Princess Diana, entitled ‘After Diana: Irreverent Elegies’. The purpose of this article is to trace the origins of the Diana phenomenon, and particularly that variant which possessed the English political imagination in late summer 1997; and in so doing to investigate further the cultural context of a constitution that is presently the subject of considerable debate regarding its potential reform. The first part will take a closer look at ‘Diolatry’. The second part will then concentrate upon the ultimate Diana figure in English constitutional history, Gloriana herself, Elizabeth I. The third part of the article discusses the residual authority of monarchical iconography in the English constitutional culture. The conclusion will then suggest why, rather than testifying to a supposed mood of fundamental constitutional change abroad in the country, reactions to Diana’s death evidence the innate strength of a constitutional imagination that still craves the reassurance of its Fairy Kings and Queens.