The flag of England is derived from St George's Cross (heraldic blazon: Argent, a cross gules). The association of the red cross as an emblem of England can be traced back to the Middle Ages, and it was used as a component in the design of the Union Flag in 1606. read more
The flag of the United Kingdom (also known as the Union Jack) has incorporated the St George’s Cross from the English flag to a major degree. The St Patrick’s Cross (a red “x” on a white background) has also been used to indicate the merger of the Kingdom of Great Britain with the Kingdom of Ireland. read more