This image of him being dragged through the streets to his execution, a panel from a 15th century painting by Bernat Martorell, explains why Westminster Cathedral has a chapel dedicated to St. George and the English Martyrs. Those martyred saints who were accused of treason because they were Catholic priests, or were converts or had influenced the conversion of others, were dragged through the streets just like St. George had been.
More about the painting here and here. (It's one of those art history mysteries recently solved; the pieces of a retable were separated during the Spanish Civil War and still are: one piece in Chicago, the rest in Paris!)
The Cathedral's website has not been updated yet, but the page for the chapel explains the plans and this story from The Catholic Herald describes the changes after they'd been unveiled last year. I posted information about the dedication of the chapel here.
St. George and the English Martyrs, pray for us!