The magic of Harry Potter doesn’t appear to be enough to slow down the success of Fifty Shades of Grey.

The racy novel has become the best-selling book of all-time on Amazon.co.uk – replacing Harry Potter and the Deathly Hallows.

Sales of the Fifty Shades trilogy have also outstripped those of all seven Potter books on the website.

Author E.L. James’ Fifty Shades trilogy has now sold more than four million copies in print and on Kindle since March this year.