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.

A March 17 Instagram post (direct link, archive link) shows the Union Jack flying at half-mast on a rooftop. "BREAKING: Reports that the Union Flag is flying at half-mast at some Government Buildings ...

Britain's national flag, the Union Jack, was spotted upside down during King Charles and Queen Camilla's visit to Arlington National Cemetery.

Aside from soccer or royal events, Brits don't fly their flag as much as Americans do. Now, with anti-immigrant groups embracing the Union Jack, it's part of a debate on what it means to be British.