<Tr> <Th> Proportion </Th> <Td> 1: 2 </Td> </Tr> <Tr> <Th> Design </Th> <Td> A field of air force blue with the Union Flag in the canton and the RAF roundel in the middle of the fly . </Td> </Tr> <P> The national flag of the United Kingdom is the Union Jack, also known as the Union Flag . </P> <P> The current design of the Union Jack dates from the union of Ireland and Great Britain in 1801 . It consists of the red cross of Saint George (patron saint of England), edged in white, superimposed on the Cross of St Patrick (patron saint of Ireland), which are superimposed on the Saltire of Saint Andrew (patron saint of Scotland). Wales is not represented in the Union Flag by Wales's patron saint, Saint David, as at the time the flag was designed Wales was part of the Kingdom of England . </P>

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