Towered
Superstar
The Union flag, be it at the Canadian border via the underground railway or on one of HM warships intercepting a slave transport would have been a welcome site to many. Escaped slaves served under that flag, in part I imagine to ensure the US didn't come northward. Yes, there was an empire that did a lot of nasty stuff under that flag, that's what conquering new territory is all about. But if I was an indigenous or black person I'd rather be living in a country colonized by the British than by the Spanish or Belgium, for example. Anyway, I support changing the Ontario flag to better represent who we are now. Even in England they don't use the Union flag to donate the country, that's the George Cross.
On an aside, in the past decade all the counties of England (and some in Scotland) have adopted flags, and the designs are routinely outstanding.