How to Build a Reliable Line of British Monarchs
I once spent an afternoon cross-referencing six different genealogy databases because I couldn't decide whether Stephen of Blois counted as a legitimate king or a usurper depending on which medieval chronicler you trusted. That process taught me more about British royal succession than any textbook ever did. The core issue isn't memorizing names—it's deciding what counts as a continuous line when everything from 1066 onward is essentially a series of coups, adoptions, and parliamentary interventions disguised as tradition. The standard approach is to start with William the Conqueror in 1066 and move forward year by year, recording each sovereign's regnal dates, house affiliation, and the mechanism by which they took the throne. Most people skip the mechanism and that's where things fall apart. A monarch who inherited by primogeniture is categorically different from one who was elected by witan, crowned after a civil war, or installed by Act of Parliament during an interregnum. You need to track all three, otherwise your list will read like a family tree and not a succession record.
British Kings And Queens In Order
Norman and Plantagenet Period (1066–1485) William the Conqueror (1066–1087) – norman invasion, hereditary succession established with complications William II Rufus (1087–1100) – second son, skipped over elder nephew
Henry I (1100–1135) – youngest son, seized throne during brother's funeral Stephen of Blois (1135–1154) – contested reign during The Anarchy, civil war period Henry II (1154–1189) – Plantagenet founder, grandson of Henry I, settled succession by treaty
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Richard I (1189–1199) – eldest surviving son John (1199–1216) – youngest son, inherited despite losing continental territories Henry III (1216–1272) – son of John, crowned at nine after feudal crisis
Edward I (1272–1307) – son of Henry III Edward II (1307–1327) – son of Edward I, deposed and likely murdered Edward III (1327–1377) – son of Edward II, ruled through regency initially
Richard II (1377–1399) – grandson of Edward III, deposed and died in captivity Tudor Period (1485–1603) Henry VII (1485–1509) – claimed throne by conquest at Bosworth, founded Tudor dynasty

Henry VIII (1509–1547) – son of Henry VII Edward VI (1547–1553) – son of Henry VIII, died at sixteen Lady Jane Grey (1553) – nine-day reign, generally excluded from official lists
Mary I (1553–1558) – daughter of Henry VIII and Catherine of Aragon Elizabeth I (1558–1603) – daughter of Henry VIII and Anne Boleyn, died childless Stuart Period (1603–1714)
James I of England / James VI of Scotland (1603–1625) – Union of the Crowns, Scottish inheritance Charles I (1625–1649) – son of James I, executed after English Civil War Interregnum (1649–1660) – Commonwealth and Protectorate under Oliver Cromwell, no monarch

Charles II (1660–1685) – Restoration, son of Charles I James II (1685–1688) – brother of Charles II, deposed in Glorious Revolution Mary II and William III (1689–1694 / 1689–1702) – joint sovereigns, William of Orange
Anne (1702–1714) – daughter of James II, Act of Settlement 1701 determined succession House of Hanover and Later (1714–Present) George I (1714–1727) – Elector of Hanover, distant cousin through James I's granddaughter
George II (1727–1760) – son of George I George III (1760–1820) – grandson of George II, long reign covering American Revolution George IV (1820–1830) – son of George III

William IV (1830–1837) – brother of George IV Victoria (1837–1901) – granddaughter of George III Edward VII (1901–1910) – son of Victoria
George V (1910–1936) – son of Edward VII Edward VIII (1936) – abdicated after 326 days George VI (1936–1952) – brother of Edward VIII
Elizabeth II (1952–2022) – daughter of George VI Charles III (2022–present) – son of Elizabeth II The most counter-intuitive detail beginners consistently miss is that the succession wasn't governed by a single coherent rule until the Act of Settlement in 1701. Before that, it was a messy mix of feudal right, papal endorsement, parliamentary statute, and whatever the army happened to support at the moment. The Normans didn't inherit the way we think of inheritance today—they operated on a system where the reigning king could effectively nominate his successor, which is why William the Conqueror's kingdom split between his two surviving sons with no unified transfer of power.

Another thing that trips people up is the numbering system. The list above uses English numbering, which means Mary II and William III are sometimes counted as co-reigning monarchs and sometimes William is treated as the sole sovereign. Scottish numbering differs entirely from English numbering, which is why James VI of Scotland became James I of England. If you're building a reference document, you need to pick one numbering convention and stick to it, because mixing them will produce a document that looks internally contradictory to anyone who knows their history. When I maintain these lists, I keep a separate spreadsheet column tracking the succession mechanism for each monarch. It usually takes about twenty minutes to verify each entry against primary sources like the Oxford Dictionary of National Biography or the official Crown website, but skipping that step means you'll accidentally promote Lady Jane Grey to full status or forget that Edward V never actually reigned as a sovereign in any meaningful legal sense. The Wars of the Roses also create edge cases where multiple claimants existed simultaneously, and the standard convention is to list whoever was crowned and seated on the throne as the legitimate ruler while noting the rival claimant in a footnote. The biggest limitation with any single ordered list is that it inherently flattens the complexity of contested successions. The Anarchy between Stephen and Matilda lasted nineteen years. The period after Elizabeth I's death involved genuine diplomatic panic across Europe before James VI secured his claim. These aren't footnotes—they're the actual mechanics of how the monarchy survived, and a simple ordered list makes them look like brief interruptions rather than near-collapse events. If you need academic rigor, pair the list with a timeline that shows overlapping claimants and periods of interregnum rather than treating every reign as a clean handoff from one person to the next.