A design from BLAZONED.
The use of three lions as the symbol of the English monarchy dates back to King Richard I, “The Lionheart,” and echoes the coat of arms of Normandy, from which William the Conquerer launched his famous invasion.
The national flag of England is St. George’s Cross, a red cross on a white background. St. George is the patron saint of England, and his cross has been associated with England since at least the twelfth century.
The quote on the banner is from Act II, Scene 1 of Richard II by William Shakespeare. Here is the entire speech, which alludes to the fact that England has not been successfully invaded since William the Conquerer crossed the Channel:
This royal throne of kings, this sceptred isle,
This earth of majesty, this seat of Mars,
This other Eden, demi-paradise,
This fortress built by Nature for herself
Against infection and the hand of war,
This happy breed of men, this little world,
This precious stone set in the silver sea,
Which serves it in the office of a wall
Or as a moat defensive to a house,
Against the envy of less happier lands,–
This blessed plot, this earth, this realm, this England.