During the reign of William III & Mary II in 1692 the International Statute of Wizarding Secrecy was signed, separating the lives of the magical and the muggles. The reign of the muggle royal family over the magical population of Britain - and later the United Kindgom - was largely undisturbed; both British societies observed the same monarch until the pure-blooded of the magical society began demanding detachment. From what started as being general discontent grew into violent actions with a magical civil war approaching over the horizon. In a stroke of luck that avoided turmoil, the ruling King George III had a magical daughter hidden from the muggle society. This daughter, Princess Charlotte, was quickly installed as the monarch of the magical society of Britain - an act which finally separated the two.
The arrangement worked out perfectly for both societies; whilst both monarchies were separate, the two worked closely to ensure similar values were shared and upheld. When the muggle monarchy changed their house name to Windsor, the magical monarchy followed suit. Everything was harmonious until the ascension of King Henry II. A monarch who wanted to devolve the power of the Ministry itself, Henry became tyrannous early on in his reign. Turmoil that threatened to overthrow the monarchy rose again, saved only by the forced abdication of Henry and the replacement by his eldest daughter, Victoria.
Proving to be the saving grace of House Windsor, Queen Victoria remedied her father's mistakes. She appealed to all crowds of magical life; advocating for no discrimination for species, being proud enough of her pure-blooded heritage to satisfy those who cared whilst remaining completely relatable for all. Her reign, still going strong, has remained among the most harmonious and popular since the magical monarchy's establishment.
The love story between Queen Victoria's eldest son and heir, Arthur, and Maud Weasley is as close to a modern fairytale as there can be. The strictly raised pure-blooded prince had met the commoner pure-blood in their first ever potions lesson in first year at Hogwarts and clicked immediately, their personalities bouncing well off one another. The media followed them from their obvious crushes on one another until the official announcement of their relationship, the two of them constantly being the objects of "will they won't they" both at a relationship level and at engagement.
Their relationship captivated the magical society both nationally and internationally, therefore making it a surprise to nobody that their wedding remains among the most viewed magical event in recent history - superseding the most recent Quidditch World Cup at the time. Everyone was enamoured by the cool, relaxed prince and the bubbly, effervescent commoner. In true Maud style, the way the bride nearly bounced down the aisle confirmed to everyone that the monarchy would be in fun, yet stable, hands.
As all royal couples, the need for children followed soon after the wedding. Alfred was the first, their designated heir, and three more - Charlotte, Helena and Richard - followed. Just like their contrast in personalities, Arthur and Maud wanted to take different approaches to their children's upbringing. The prince favoured a traditional royal upbringing, stating that the children were second to fifth in line for the throne and thus had to be brought up accordingly whilst Maud, ever so in touch with the muggle lifestyle, advocated for a more relaxed childhood, stating that it'd be the only time in their lives that they'd be able to be relaxed. A compromise of the two was made and worked well.
Knowing how important the connection between the magical Windsors and the muggle Windsors were, Princess Maud wanted her children to experience the muggle lifestyle for themselves as to be more understanding when interacting with their muggle counterparts. Trips to Tesco's, Nando's and McDonalds were frequent and much loved by the royal princes and princesses. The purchase of one of these trips, a small pot of slime, is how seven-year-old Alfred had his first magical experience. Enamoured by the substance, the heir played with it until he was making it multiply massively by the second. Saved by his mother, it was all the confirmation needed that he'd remain second in line for the throne.
As a child of the direct line from Queen Victoria, Alfred was expected to attend Hogwarts as to show his pride in being British. He had no objections to it; hearing stories from his parents' time there had made him more than excited and, upon arrival at eleven, he was sorted into Gryffindor. Alfred was a model student during his time at the school - whilst he chose not to pursue titles such as prefect or head boy, he made a name for himself as one of the highest achieving students in Hogwarts history.
Ever since graduation, Alfred has thrown himself into royal duties. Much like a counterpart of his would, he has visited nations that make up the Magical Commonwealth, representing the House of Windsor when his grandmother can't. Usually accompanied by his mother at the least, it's obvious Alfred will continue the family tradition of putting on being the heir that put's on a good face, even when other family members do the opposite.