According to Alan Wilson & Baram Blackett, England’s patron saint is not the Turkish Roman officer, (St.) George, but an heroic 1st century AD British Christian king, Gweirydd, also known as Arviragus (a title), whose capital was at present-day Wroxeter. ‘Gweirydd’, they say, is a Briton language (not English, more Welsh – Cymric) version of the name ‘George’. They cite lines in the British Chronicles of Hardynge, who say that it was Joseph of Arimathea himself, who converted Gweirydd and bestowed on him a white shield and cross. I read about this in The Holy Kingdom (Gilbert, Wilson & Blackett) but it is mentioned too in this online article:
Joseph of Arimathea Came to Britain
9 things you didn’t know about St George
Puts a different perspective on matters eh?
23rd April 2020
Edited 23rd April 2021
* Has to be said though, nobody knows the date that Gweirydd was done for, but I doubt it was 23rd April.