The Line of Succession to the British throne is governed by laws centuries old. It was the Act of Union in 1800 (restating the 1701 Act of Settlement William and Mary’s Bill of Rights in 1689) that meant only Protestant heirs of Princess Sophia, Electress of Hanover and granddaughter of James I, were eligible to succeed. Royal History
The Queen will currently be succeeded by..
1. Charles, Prince of Wales (heir apparent)
2. Prince William, Duke of Cambridge
3. Prince George of Cambridge
4. Princess Charlotte of Cambridge
5. Prince Henry of Wales
6. Prince Andrew, Duke of York
7. Princess Beatrice of York
8. Princess Eugenie of York
9. Prince Edward, Earl of Wessex
10. James, Viscount Severn
11. The Lady Louise Mountbatten-Windsor
12. Princess Anne, Princess Royal
13. Peter Phillips
14. Savannah Phillips
15. Isla Phillips
16. Zara Tindall
17. Mia Tindall
18. David Armstrong-Jones, Viscount Linley
19. Charles Armstrong-Jones
20. Margarita Armstrong-Jones
The Sovereign must be in communion with, i.e. a member of, the Church of England. To sit on the throne, one must swear to preserve the Church of England and the Church of Scotland and uphold a Protestant succession.
The 2013 Succession to the Crown Act made amendments to the aforementioned Bill of Rights and Act of Settlement: it replaced primogeniture with absolute primogeniture (the eldest child takes precedent, regardless of sex) and stated that any Royal who marries a Roman Catholic, so long as they remain Protestant themselves, may remain in the line of succession. Before this, those who married a Catholic were disqualified. This Act applies to anyone born from the 28th of October 2011 onwards, and was effected in March 2015.
Following the laws of Great Britain, The Prince of Wales will take the throne, and this is only right. Her Majesty will not abdicate since she took the vow she made to her people at her coronation very seriously, and passing over a legitimate heir would cause countless problems for the UK. Read why Prince Charles must be our next King here.