It is called a Red Ensign which was used by the Royal Navy and later their Merchant Marine ships from the 1620's onward on their ships.
In other words, Britain.
The australian flag. Blue background, with a union jack in the top left corner, the federation star in the bottom left corner and the southern cross on the right.
Any country's National Flag with a small Union Flag on the upper left corner was once a member of the British Empire.
That is the flag of the Red Cross, not of a country. The flag of Switzerland has a red background with a white cross. The flag of Tonga has a red cross on a white field, the corner of a red flag.
The Union Jack (Union Flag) is in the upper left-hand corner of the Australia flag. "The Union Jack itself is a composite flag symbolizing the union of the historical components of the United Kingdom. It is composed of intersecting and overlayed red and white vertical and diagonal crosses on blue and white background." Source: http://www.anbg.gov.au/oz/flag-union.html
It's Greece's flag.
The Blue Ensign is one of several British ensigns used by organisations or territories associated with the United Kingdom.
It's a union jack. From England.
Fiji's flag represents many things. The shield is the country's coat of arms. The blue background on the flag represents the very important Pacific Ocean. The Union Jack in the upper left corner represents the ties the island has with the UK. The shield is the country's coat of arms.
Cook island
The first flag during the colonization was the English flag (white with a red cross) in 1497. Followed by French flag which had 3 golden fleurs-de-lis on a blue background. The first flag of Canada after the independence was the Red Ensign, which consisted of a Union Jack in the top left corner and the coat of arms on a red background.
It is representing the Scotland flag on the Union Jack.
the union jack