So, what else would people like to see in this timeline, for the record this is what we have so far:
POD: 1817, the birth of Henry William Frederick, only child of His Royal Highness William Frederick, Duke of Gloucester and Edinburgh and his wife Her Royal Highness, the Duchess of Gloucester and Edinburgh.
May 1819: Birth of a son and daughter to Their Royal Highnesses the Duke and Duchess of Kent and Strathearn, the boy is named George, the girl Alexandrina.
February, 1820: An assassination attempt on Charles Ferdinand, Duc du Berry fails, the assailant is captured and executed for attempted murder and treason.
December 1820: Birth of Elizabeth of Clarence, fourth in line to the throne and daughter of William and Adelaide, Duke and Duchess of Clarence and St Andrews.
March 1821: Princess Elizabeth avoids catching the illness that killed her otl, and develops into a healthy babe.
September, 1824: Two double blows for the House of Bourbon as King Louis XVIII and his heir and brother Charles Count of Artois die one from long term gout, the other a sudden serious ailment. Charles's son Louis, Duke of Angouleme ascends the French throne as Louis XIX.
1830: As tensions grow high in the United Kingdom of the Netherlands, a plan is put forward for a division of the Southern Netherlands, known as the Talleyrand plan, it pleases nobody and is rejected. Revolt breaks out in the Southern Netherlands.
1832: HRH Prince Leopold of Saxe-Coburg and Gotha, Duke of Saxony (and former son-in-law of George IV) is offered the Greek throne after the London Conference. He is hesitant to accept due to concerns about the precariousness of the political situation following the War of Independence but following pressure from William IV he accepts and his appointment is later ratified in the Treaty of Constantinople.
1834: After the destruction of the Palace of Westminster in a fire, King William IV succeeds in selling the idea of Buckingham House to Parliament for them to sit and use as their place of debate. Renovations continue.
1837: His Majesty the King dies, and is succeeded by his daughter Elizabeth, as Elizabeth II under a brief regency controlled by her Mother and cousin the Duke of Kent and Strathearn who abdicates his place to the Duke of Sussex, to take control of Hanover as its King.
1839: Marriage of Elizabeth II to her cousin Henry William Frederick, Duke of Gloucester and Edinburgh, Henry is granted the title King Consort by Parliament.
1840: After the conclusion of the uprising in the Southern Netherlands, infighting in the newly created Belgium leads to potential civil war, the Talleyrand plan is brought up once again, and this time there are serious considerations for it. However, war looms as Britain, France, Prussia - and Bavaria -, and the Netherlands all want a stake in the pie.
Alongside family trees for Britain and France:
Elizabeth II of United Kingdom of Great Britain and Ireland (b.1820: d. 1892) m Henry William, King Consort and Duke of Gloucester and Edinburgh (b.1817: d. 1892)
Issue:
William V of the United Kingdom of Great Britain and Ireland (b. 1840)
Adelaide, Princess Royal (b.1841)
Frederick William, Duke of York and Albany (b. 1844)
Sophia (b. 1848)
Henry William, Duke of Clarence and St Andrews (b. 1855)
Like otl Edward VII, William V would have a brief tenure in the armed forces, never actually actively, serving. He would however unlike Edward, be a lot more studious and less philandering, working hard, and learning his duties. A decent politician, but slightly dour of humour.
His brother Frederick, would join the Army, at his father's insistence. And would rise to the rank of Field Marshal after a long and good career. He'd be the opposite to his brother, a bit of a womaniser, cheery, jovial and a natural born leader.
Henry William, would enter the navy and be a rise to be an Admiral of the Fleet, he'd spearhead reforms that would improve Britain's naval performance toward the end of the century.
Adelaide, Princess Royal would be like a combination of her mother and father, hard working, but also cheery and a bit of a flirt.
Princess Sophia, would be shy, fiercely so. But also very prideful.
And
As for the French royal family I think it'd look something like this:
Charles X of France (b.1778: d. 1846) m Marie Caroline of Naples and Sicily (b.1798)
Issue:
Louise Marie, Princess of France (b.1819)
Henri V of France (b. 1820)
Louis, Duke of Bordeaux (b. 1822)
Maria Clementina of France (b.1825)
Maria Theresa of France (b.1828)
Charles, Duke of Angouleme (b. 1831)
Louise Elisabeth (b.1834)