A lone British businessman has beaten Batman, Superman and Spiderman over the legal right to use the word "superhero" in the title of his book.

Graham Jules was about to publish his self-help manual "Business Zero to Superhero" in 2014 when he got a letter from Marvel and DC Comics claiming the word infringed their jointly-owned trademark.

But modest Mr Jules fought back and even rejected an offer of 'a couple of thousand' to change his book title.