Gibraltar is a small British Overseas Territory located at the southern tip of the Iberian Peninsula, bordered to the north by Spain. Its currency is the Gibraltar Pound, which is locally interchangeable with the Pound Sterling, to which it is pegged at par; however, the Gibraltar Pound is legal tender only in Gibraltar and not in the United Kingdom.
The territory has also authorised some mints to issue commemorative and other non-circulating coins under its jurisdiction, such as this one.
The Harry Potter 2020 Gryffindor School of Witchcraft and Wizardry Coin denominated as £1 was struck by The Crown Mint.
The Mint says about it:
Hogwarts was founded over a thousand years ago by four powerful wizards: Godric Gryffindor, Salazar Slytherin, Rowena Ravenclaw and Helga Hufflepuff. They chose to split the students into four "houses", each bearing their surnames and featuring young wizards and witches who displayed abilities and personalities they wanted to nurture. To do this, Godric Gryffindor used his magical hat - henceforward known as the Sorting Hat - to decide which children should go into which house, and so it has been ever since with a yearly Sorting Ceremony that places each new pupil into their own new home.
Notable Gryffindor members include (of course) Harry Potter, Hermione Granger and Ron Weasley. | 
Search for Gibraltar: One Pound 2020 Harry Potter - Gryffindor House on eBay 
