Helen Ruth Castor is a British historian of the medieval and Tudor period and a BBC broadcaster. She taught history at the University of Cambridge and is the author of books including Blood and Roses (2004) and She-Wolves: The Women Who Ruled England Before Elizabeth (2010). Programmes she has presented include BBC Radio 4's Making History and She-Wolves on BBC Four.

The Royal Society of Literature (RSL) is a learned society founded in 1820, by King George IV, to "reward literary merit and excite literary talent". A charity that represents the voice of literature in the UK, the RSL has about 600 Fellows, elected from among the best writers in any genre currently at work. Additionally, Honorary Fellows are chosen from those who have made a significant contribution to the advancement of literature, including publishers, agents, librarians, booksellers or producers. The society is a cultural tenant at London's Somerset House.