If memory serves me correctly, the choosing of St.George was influenced by the Crusades and a little bit of French persuasion methinks around the end of the eleventh century. I am sure I will be corrected if I am wrong.
St.Edmund the Martyr was our boy during the good old Anglo-Saxon days pre William the Conk.
So forget cheering on that foreign imposter George and raise the cry for that good old Anglo-Saxon and true Englishman Eddie the Martyr. It's got a better ring to it as well, hasn't it?
No more red cross, bring on the White Dragon for the lads.