Well, Uther Pendragon had it on his banner.
Dragons are off somewhere, gargling with salt water every evening after a day of burning stuff down, and having a good laugh about Arthurian legends. 👑🐉
“The Once and Future King” finale is set in the gunpowder era, and even by Arthurian fiction standards is kinda worthless, IMHO.
[snip] The cannons of his adversary were thundering in the tattered morning when the Majesty of England drew himself up to meet the future with a peaceful heart. [/snip]
https://gutenberg.ca/ebooks/whiteth-onceandfutureking/whiteth-onceandfutureking-00-e.html
https://en.wikipedia.org/wiki/The_Once_and_Future_King
How long ago were the first dinosaur bones found in the British Isles?