The international relations of the wizarding world would be redrawn. Queen Elizabeth would use her diplomatic skills to strengthen ties with other wizarding countries. She might also introduce new trade policies. For example, trading magical artifacts for Muggle - made goods that could be useful in the wizarding world. The story could also explore how the wizarding world, under her rule, would interact with the Muggle world on a more regular basis. This could lead to some interesting plotlines, like how Muggles would react to the existence of a wizard - ruling queen and how the wizarding world would keep their secrets while still having a closer relationship with Muggles.
She could completely transform the Ministry of Magic. Given her experience in governing, she might restructure it to be more efficient. For example, she could create new departments to deal with things like the proper handling of magical creatures in a more humane way. And in terms of the education system, she might introduce a more comprehensive curriculum that includes not only magic but also Muggle studies from a historical and cultural perspective.
One possible plot could be that Queen Elizabeth discovers she has magical powers and is secretly a part of the wizarding world. She decides to use her influence in the Muggle world and her new - found magical abilities to bring about a new era of cooperation between the two worlds. She could visit Hogwarts and offer her wisdom and resources to help improve the school, while also learning more about magic herself.
Harry would likely be very curious about the court and its people. He might use his magic in small, discreet ways to amuse the courtiers, like making a flower bloom in his hand. He would probably be polite and respectful, but also a bit of an outsider. His different style of dress and his magic would make him stand out, and he'd have to explain himself carefully to avoid being seen as a threat.
There could be. Fanfiction writers often come up with the most creative and unexpected crossovers. Harry Potter's world is full of magic and adventure, and imagining him protecting Queen Elizabeth could lead to some really interesting plotlines. But you'd have to search through various fanfiction platforms to find one like that.
I'm not sure if there are many highly recommended ones. Fanfiction can be a very niche area, and combining 'Harry Potter' with Queen Elizabeth is rather unusual. You might have to search through various fanfiction platforms very thoroughly to find something that stands out.
A possible scenario is that Queen Elizabeth has a magical artifact that has been passed down through generations in the royal family. This artifact draws the attention of Harry Potter and his friends. They come to her palace to investigate, and she becomes involved in their adventures. She could offer them resources and protection in the Muggle world, while they introduce her to the wonders of the wizarding world.
The pure - blood families would be the most resistant. They would see Queen Elizabeth as an outsider and someone who doesn't understand the 'pure' wizarding ways. The Malfoys, for example, would try to undermine her at every turn. But the more progressive wizarding families, like the Weasleys, would welcome her. They would see her as a chance to break down the barriers between Muggles and wizards. And the students at Hogwarts would be divided at first, but as they see the positive changes she brings, more and more of them would support her.
One possible plot could be that dark wizards are planning to use Queen Elizabeth as a symbol to gain power in the Muggle world. Harry Potter, being the hero, gets wind of this plot and uses his magic to secretly protect her. He could use spells like the Fidelius Charm to keep her location hidden from the dark wizards.
It could be about Queen Elizabeth somehow being a part of the wizarding world in the 'Harry Potter' series. Maybe she's a secret witch or has some connection to Hogwarts.