The English version of the First Union Flag, 1606, used mostly in England and, from 1707, the flag of the Kingdom of Great Britain. The Scottish version of the First Union Flag saw limited use in Scotland from 1606 to 1707, following the Union of the Crowns.
Then, why are there two different flags for England?
England only has one flag. The red cross on the white background. The UK has its own flag and is commonly called the “union jack” - that's probably what you are thinking of. This is the flag of the “union” of the nations of England, Wales, Scotland and Northern Ireland.
How did England get its flag?
The Saint George's Cross. In the Union Flag this represents the entire Kingdom of England, including Wales. The English version of the First Union Flag, 1606, used mostly in England and, from 1707, the flag of the Kingdom of Great Britain.
Which country's flag is white with a red cross?
The flag of Switzerland consists of a red square with a bold, equilateral white Greek cross in the centre. It is one of only two square flags, the other being that of the Vatican City.