Watch on SFlix. Behind the scenes at the confectionery company's base in Bournville near Birmingham as staff gear up for the festive season, hitting the factory floor to discover how popular treats Roses are made, with the focus on the creation of the hazelnut in caramel. Historians and Cadbury insiders tell the story of how Cadbury first turned Britain on to festive chocolate, while Santa and his team prepare for the rush at Cadbury World.