How the Line Actually Works
The English Royal Family Line Of Succession isn't some clean vertical ladder you can draw on a napkin. It's a sprawling, centuries-old web built on blood ties, parliamentary statutes, and religious restrictions that have shifted more times than most people realize. The simple version everyone learns is that the eldest child of the monarch comes first, then their siblings in age order. But the real mechanics are messier than that, and if you're trying to map it out properly, you'll hit contradictions pretty quickly. The current legal framework rests on three main pillars. The Act of Settlement of 1701 established that Catholics cannot inherit the throne and that anyone who marries a Catholic is also disqualified. The Bill of Rights of 1689 added further restrictions around those who reconcile with the Roman Catholic Church. Then the Succession to the Crown Act 2013 changed the rules to absolute primogeniture for those born after 28 October 2011, meaning birth order now matters regardless of gender. Before that date, males still take precedence over females born at the same level. Here's something most people get wrong: the line doesn't start with the current monarch and flow downward. It flows outward from a common ancestor, and every person in the line is ranked by how closely they're descended from that ancestor compared to everyone else. That means the sovereign's siblings, cousins, aunts, and uncles can all sit ahead of the sovereign's children in certain narrow scenarios depending on how the math works out. In practice this rarely causes confusion because the current line is exceptionally tight, but the underlying structure matters when you're tracing deeper branches.
Mapping the English Royal Family Line Of Succession Step by Step
The way I approach this is to work backwards from the current monarch to the closest common Protestant ancestor, then branch outward from there. For the present line, that anchor point is Princess Sophia of Hanover, who died in 1714. The Act of Settlement specified that succession should pass to her and her descendants, excluding Catholics entirely. So every person in the official line traces back through one of Sophia's children or grandchildren. To build an accurate list yourself, start with the reigning sovereign and list their descendants in strict order of proximity to Sophia of Hanover, filtering out anyone who falls under the disqualification clauses. Each generation splits into branches, and within each branch you order by age. The tricky part is that when a branch dies out or falls off the line due to religion, the next branch takes over, which creates those jumps where the succession passes to a cousin's line instead of continuing directly down. I ran into a specific problem last year when someone asked me to map out the succession at a point roughly twenty years back, around the time Princess Anne's children would have been positioned relative to Prince Edward's. The confusion comes from the fact that Princess Anne, despite being older than Prince Edward, has a different standing depending on which year you're looking at. Before 2013 she was behind her younger brother in the line because males took priority. After 2013 her children retained their positions based on the old rules since they were born before the cutoff. I had to manually recalculate two full branches and cross-reference the 2013 Act's transitional provisions to get it right. The workaround was to build separate trees for pre-2011 and post-2011 births and then merge them with the age ordering applied within each cohort.
The official line is maintained by the College of Arms and published through various government channels, but those publications only go so far back before becoming imprecise. They typically list about the first one hundred or so positions, which covers everyone who might realistically become monarch within several generations. Beyond that, the list becomes theoretically complete but practically irrelevant since the odds drop off sharply. One common pitfall people run into is assuming that marriage to a Catholic automatically removes someone from the line. It doesn't remove them outright. It only removes them if they marry a Catholic after the fact, and even then the disqualification is subject to the monarch's prerogative to pardon the situation in certain circumstances. The actual text of the Act of Settlement says a person "shall be held to be attached to the Popish religion" and therefore excluded, but the 2013 Act narrowed this significantly to apply only to the person themselves marrying a Catholic, not to their spouse's religion alone unless the person joining the marriage is the one converting. Another thing that trips people up is the difference between the United Kingdom's line of succession and the separate lines held by other Commonwealth realms. Canada, Australia, and the other kingdoms share the same monarch but technically each has its own succession law. The 2013 changes required individual legislative action in each realm, and while all of them passed similar reforms, the timing and exact wording varied. This created a brief window where the lines were technically divergent, though no actual change in the person holding the throne resulted from it.
Get the Full Details

If you're building this from scratch for research or personal interest, I'd recommend starting with the genealogical databases at the College of Arms or the official Royal Household website rather than trying to construct it entirely from primary sources. The primary legal texts are publicly available but parsing centuries of amendments and case law to get the ordering exactly right is tedious and error-prone. I've seen people spend weeks on it and still miss a detail here and there. The biggest limitation of any line of succession list is that it's always provisional. Births, deaths, marriages, and conversions constantly reshuffle positions. A single unexpected Catholic marriage in the wrong generation can knock dozens of people off the line overnight. The system is designed to be stable, but it's fundamentally dependent on human decisions that are impossible to fully predict. For most practical purposes the top forty or so positions won't change dramatically within a decade or two, given how few eligible candidates exist at the highest levels. But if you need something more thorough than a casual overview, you'll want to track the lineage back through the House of Hanover and into the earlier Stuart and Plantagenet lines, where the branches multiply exponentially and the Protestant filter eliminates large swaths of descendants who would otherwise be in line.