Union Jack

[nightowl]

When did the Union Jack officially become England's national flag?

[athenae]

this gives a history -

http://en.wikipedia.org/wiki/Union_Flag

..... When the flag was initially introduced, in 1606, it was known simply as "the British flag" or "the flag of Britain". The first use of the name "Union" appeared in 1625. The word 'jack' was in use before 1600 to describe the maritime bow flag .....