The 'Union Flag' or the UK is commonly (and incorrectly) called the Union Jack. A jack is a small flagpole on the front of a ships. This is where the Union Flag is flown on Royal Navy ships, hence a flag used for that specific purpose is called a Union jack flag. All other usage, other than naval, should refer to it as the 'Union Flag'.
Interestingly enough, the Union Flag is not the official national flag of the UK, because the UK does not have a legally defined national flag. It is just commonly accepted as being so.
The Union Flag is called the Union Jack only when it's flown at sea. The countries that have the Union Flag on them are:
1.Akrotiri
2.Anguilla
3.Ashmore and Cartier Islands
4.Australia
5.Bermuda
6.British Indian Ocean Territory
7.British Virgin Islands
9.Coral Sea Islands
10.Dhekelia
12.Fiji
13.Heard Island and McDonald Islands
14.Montserrat
15.New Zealand
16.Niue (with embellishments)
17.Pitcairn Islands
18.Saint Helena
19.South Georgia and the South Sandwich Islands
20.Tokelau
21.Turks and Caicos Islands
22.Tuvalu
The Union Jack flag is just based off of the United Kingdom.
The union flag represents the countries in Great Britain. England , Scotland and Wales. Northern Ireland is part of the United Kingdom but not of GB.
England, Scotland, north Ireland, but Wales is not on there yet.and it never will be shitlords
The UK has a flag called the Union Flag. Properly speaking it is only called the Union Jack when flown on the Jackstaff of a ship. The Jackstaff is a small flag pole at the stern of a ship
The jack refers to the jackstay of a ship, on which the Union Jack would be displayed. Strictly speaking the flag should be called the Union Flag, but Union Jack is well known. Actually, the union jack is what the flag is called out at sea, but the union flag is what they call it on land.
It commonly known as the Union Jack, although its proper name is the Union Flag.
The nickname for the British flag is the Union Jack. Although it is only correctly known as this when flown on a ship.
The Union Jack - properly known as the Union Flag.
Union Flag, or more casually the Union Jack
The Union Jack, also known properly as the Union Flag.
Red, White and Blue. It is known as the Union Flag, or sometimes erroneously as the Union Jack.
the Union Jack
I'm not sure what you mean by 'special name', but the official name for the British flag is: Union Jack
The Union Flag, it is only correctly termed the 'Union Jack' if it is raised on board a ship.
The Union Flag commonly known as the Union Jack is the blue, white and red flag of the UK.
The Union Jack is the nickname of the UK flag.