Original: The Kingdom of Great Britain was superseded by the United Kingdom of Great Britain and Ireland on 1 January 1801 , when Great Britain was united with the Kingdom of Ireland by the Acts of Union of 1800 following the suppression of the Irish Rebellion of 1798 .
Simplified: The Kingdom of Great Britain was followed by the United Kingdom of Great Britain and Ireland in 1801 when the Kingdom of Ireland became part of the United Kingdom by the Act of Union 1800 after the suppression of the Irish Rebellion of 1798 .