“They sound like Harry Potter titles, they look like Harry Potter titles, but unless you are JK Rowling, the schoolboy wizard’s creator, you had better not think of using them as Harry Potter titles.

Harry Potter and the Chariots of Light, Harry Potter and the Mudblood Revolt, Harry Potter and the Alchemist’s Cell and Harry Potter and the Quest of the Centaur have all been registered as trademarks with the UK Patent Office.

The names were taken by a company which shares an office with the London lawyers of Warner Bros, the studio which makes the Potter films.

One possibility is that the titles are on a shortlist of possible names for the forthcoming books and have been registered to prevent other companies cashing in on the huge merchandising potential of the Potter books and films.” The Scotsman However, one fan commented on a Potter website that “lame and cheesy” titles like these are just a way of keeping fans guessing.