Britain’s history is a history of invasion.

The sea that surrounds its shores is both a barrier and a superhighway – one that is led to the creation of an overseas empire, and 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.