The high-end London department store, Harrods, said Thursday that it is “utterly appalled” by allegations of abuse – including rape – perpetrated by its former owner, the late billionaire Mohamed Al Fayed.

As London editor of Vanity Fair, Henry Porter desperately tried to expose the sex crimes of the Harrods owner as far back as 1995. Here he tells Mark Hollingsworth how hard it was to make the accusati