On the journey of making my new documentary film “Quintessentially British,” I encountered some quirky lords, charming knights, irrepressible dames and Shakespeare-quoting taxi drivers. I grew up in ...

RUGBY, England—Stuart Field raised his first flags in July: the English red cross of St. George and also a smattering of the British red, white and blue, hanging them from his hometown’s streetlights.

Bitter debate about immigration in the United Kingdom has triggered a new trend of flying English and British flags in a vivid show of patriotism spearheaded in part by far-right figures. Usually ...