Flag of Suffolk, UK. An armorial banner attributed to the canonised King Edmund of East Anglia, killed by vikings in 869. Adopted as the county flag in 2017.
A warning to the curious
http://gutenberg.net.au/ebooks06/0605921h.html
"So, if you find a crown / It's best you leave it in the ground / Or sadly I will have to track you down / And turn your sweet smile upside down"