WH Smith’s website is back online having been down for a week following the revelation that it was selling abuse themed pornographic e-books.

The company said that the titles were “unacceptable” and the website was taken down completely on Monday.

WH Smith takes e-book content from Kobo.com which has since suspended the sale of all self-published books through its UK store.

WH Smith added: "We sincerely apologise for any offence caused."