Cassiterides (2007) told the story of the end of Roman rule in Devon, following the lives of Roman noble Gaius and his family as they become inextricably linked with the local tribal leader Emrys and his impetuous protégée Belarion, who control the tin fields of Dartmoor. In classical mythology the Cassiterides – literally the islands of tin – were thought to lie to the west of the known world, and a strong candidate for their location is the South West peninsula of Britain. The play discussed themes around the end of empire and cultural conflict, and was written by Mark Beeson in collaboration with  three young writers: Daniel Rayner, Daisy Martinez and Laura Wilson.