Writer and broadcaster Rosie Boycott makes the case for choosing Diana, Princess of Wales, as the greatest Briton of all time. Hers was a story of innocence lost, of the fairytale princess who won the hearts of the nation but who failed to triumph over adversity, despite her mass appeal. Boycott argues, however, that it is precisely because of her struggle and tribulations that Diana became a truly great Briton.

Richard Holmes proposes Cromwell on Friday at 9pm.

Producer Clare Beavan
Series producer Mark Harrison

Great Britons Collection at 11.20 has a documentary on Diana, Princess of Wales BBCi: special interactive features are available to digital viewers Simon Schama on UK History: page 30