The Welsh dragon does not appear on the flag because when the first Union Flag was created in 1606, Wales was already united with England from the 13th century. This meant that Wales a Principality instead of a Kingdom and as such could not be included.
In 1536, under Henry VIII, the Act of Union joined England and Wales officially.
What would the Union Flag look like if Wales was represented?
In November 2007, a Welsh MP, Ian Lucas, asked parliament why Wales is not represented in the Union Jack. Of course, we have the answer here on our website, but what if Wales was represented, what would the flag look like?
Below you can see Ian Lucas' version of the Union flag with Wales represented:
Does the Union Flag as we know it, have a future?