The Kingdom of England and the Kingdom of Scotland joined together to become the Kingdom of Great Britain in 1707.
No, he will be King (when it happens) of the United Kingdom
The Kingdom of England has no specific founding date
they were dissatified
Ther is no such thing as a "A Citizen of England", however you can apply to become a Citizen of the United Kingdom by asking at any British embasy or consulate.
The Kingdom of England (which included the Principality of Wales) and the Kingdom of Scotland became a political union in 1707. The crowns were however already united from 1603 onwards under James VI of Scotland (I of England and Ireland) who used the title Great Britain before it was used politically. In addition the title UK wasn't used until 1801 when the Kingdom of Ireland was joined to become the United Kingdom of Great Britain and Ireland.
Edinburgh and London - where the respective parliaments were.
On 1 May 1707, the Kingdom of Great Britain was created by the union of the Kingdom of England (which included Wales) and the Kingdom of Scotland as a result of the Treaty of Union agreed on 22 July 1706, and ratified by both Parliaments, each passing an Act of Union in 1707. Almost a century later, the Kingdom of Ireland, already under English control by 1691, merged with the Kingdom of Great Britain to form the United Kingdom with the passing of the 1800 Act of Union. England and Scotland had been separate states prior to 1707, but had been in personal union since the umion of the Crowns in 1603, when James VI of Scotland had inherited the throne of the Kingdoms of England and Ireland and moved his court from Edinburgh to London.For more detail see the Related Link.
When his mother Queen Elizabeth II dies, her eldest son Prince Charles, will become king of the United Kingdom (which includes England).
There were various independent kingdoms in England before they united to become England. Some of these kingdoms were Wessex, Northumbria, Mercia etc.
Great Britain is in Europe
Northern Ireland isn't owned by England. It is part of the United Kingdom because in a referendum, the majority of the population of Northern Ireland voted to stay in the United Kingdom and not become part of the Republic of Ireland.