Britain's history is a history of invasion. The sea that surrounds its shores is both a barrier and a superhighway - one that's led to the creation of an overseas empire, and also the arrival of many different peoples. From the Celts to the Vikings and Normans, this country - like so many others - has been a racial mix since its beginnings. Have these influxes created a deep-seated fear? Revealing stories behind centuries of immigration and invasion, this is a fascinating insight into a multicultural country and its complex psyche.
