An unofficial order of precedence in Northern Ireland, according to Burke's Peerage, 106th. Edition [1], not officially authorised by or published with authority (cum privilegio) from either Buckingham Palace (the Royal Household) or the College of Arms, or the Home Office, the Ministry of Justice or the Northern Ireland Office of Her Majesty's Government in the United Kingdom, or the Assembly of Northern Ireland, or the Northern Ireland Executive.
Orders of precedence in the United Kingdom/Royal family (men)
The order of precedence accorded to women of the royal family differs depending on whether or not they are accompanied by a husband who is accorded higher precedence. When unaccompanied, blood relations of the sovereign are always accorded higher precedence. For example, when not accompanied by Prince Charles, Camilla ranks after Princess Alexandra; when with her husband, Camilla ranks above all women other than the reigning sovereign and any queens dowager.
nb: since there is no specific place in the order for a great-grandchild of the Sovereign (no matter how directly in line), Princess Charlotte of Cambridge must presumably take precedence as the daughter of a Duke of the Blood Royal (see below).