Line To The British Throne Succession

Working Out Where Someone Stands in the Line of Succession

People ask me about this far more often than they should. I spent years doing genealogy work for a living, and royal succession was one of those niche corners that kept showing up. It looks straightforward on the surface. The monarch's eldest child is next, then their kids in order, then the next sibling, and so on. The actual mechanics are messier than most people expect. The line of succession runs from the sovereign outward through descendants, siblings, and their descendants. It's not a simple tree traversal. There are disqualifications, historical statutes, and recent legislative changes that complicate everything. The Succession to the Crown Act 2013 is the big one you need to factor in. It removed the preference for males over females for anyone born after 28 October 2011, so Prince George comes before his younger sister Princess Charlotte, who comes before Prince Louis. Before 2011, the rules were different. That matters if you're building a timeline that crosses that date. The Act of Settlement 1701 still applies. Only Protestant descendants of Sophia of Hanover can succeed. Anyone who marries a Catholic is disqualified. Being a Catholic themselves also disqualifies you. These aren't theoretical conditions. They've been enforced. I once had a client who wanted to trace a branch of a minor noble family through to the succession line, and they completely missed that a great-great-grandmother had converted to Catholicism in 1947. That one conversion knocked out an entire branch of roughly forty people from the line. Without that check, the list was wrong by dozens of positions.

The workaround I used was to pull every individual baptismal and marriage record from the relevant parish registries and cross-reference them with the diocesan records. Church of England registers from that period sometimes note religious conversion in the margins. You won't find it in a standard genealogy database. It took me about three weekends of digging through microfilm at the local record office, but it caught the disqualification that no online source mentioned.

The Practical Steps

Start with the current monarch. Work outward generation by generation. For each person, you need to establish three things: their parentage, their birth order, and their religious status. Parentage is the part people get wrong most often. Adoption doesn't remove someone from the line in the same way it does in regular inheritance law. An adopted child is not treated as a blood descendant for succession purposes. This is explicitly stated in the Act of Settlement and reinforced by subsequent interpretation. Birth order matters within each generation, but it also matters across generations because of the per stirpes structure. When a deceased parent had multiple children, their descendants take the place of that parent in the line. So the eldest child of the eldest deceased child comes before the youngest child of the youngest living child, even if the latter is older in absolute age. Religious status is where most people stumble. The 2013 Act only changed the gender preference and the rule about marrying a Catholic. It did not change the disqualification for being a Catholic yourself. If someone has been received into the Catholic Church, they drop out of the line. Their descendants who are also Catholic drop out too. Protestant descendants of a Catholic ancestor remain in the line unless they themselves are Catholic. This is a common point of confusion. Being born to a Catholic parent does not automatically disqualify you. Only your own affiliation matters.

Common Pitfalls

People regularly forget about the illegitimacy disqualification. Historically, anyone born out of wedlock was excluded from the line. The Succession to the Crown Act 2013 changed this slightly. Anyone who is a illegitimate descendant of the monarch is no longer disqualified solely on that basis. But the change only applies to the line of succession of the monarch's descendants. It doesn't reach back further. If you're tracing a line through someone who was illegitimate before the 2013 Act, that person's descendants may still be excluded depending on how the law is interpreted. Another pitfall is the assumption that all of the monarch's descendants are in the line. That's not true. The line only includes descendants of Sophia of Hanover. If a branch of the family goes back to a non-Sophian ancestor, those people are outside the line entirely, no matter how closely related they are to the monarch. I've seen this come up with distant cousins who trace their ancestry through female lines that predate Sophia. The genealogy is correct, but the succession eligibility is not. The size of the line is also misleading. There are roughly 6,000 people in it. Most of them are extremely distant relatives with negligible chance of ever ascending. But they're all technically in the line. When someone asks me to produce a complete list, I always clarify that a full listing is impractical and mostly meaningless. The useful portion is the first 200 or so. After that, you're dealing with people whose names change due to marriage and who are separated from the throne by hundreds of intermediate successors.

Where to Find the Data

The official position is maintained by the UK government and published on GOV.UK. It's updated after each birth, death, or disqualifying event. For historical work, the National Archives holds the relevant statutory documents. The peerage and gentry databases like Burke's and Debrett's have succession tables, but they sometimes lag behind legislative changes. I always cross-reference any list I build against the current GOV.UK version. If you're building this programmatically, the raw data is scattered across parish records, the National Archives' digitized catalog, and the Royal Family's own published pedigrees. No single API covers it all. The genealogical side requires pedigree charts, and the legal side requires cross-referencing the Act of Settlement, the Bill of Rights 1701, the Act of Settlement 1701, and the 2013 Act together. I use a simple spreadsheet with columns for name, parent, birth date, religion, and disqualification notes. It keeps the logic visible and makes it easy to audit when a new birth or event shifts the order. The whole process for a clean, modern lineage takes me about two hours from start to verified list. A problematic one with conversion issues or illegitimacy questions can stretch to a week. The bottleneck is always the religious records. Modern birth and marriage certificates don't capture that information, so you have to go to church archives or diocesan records, and those are not uniformly digitized.