by: Katherine Rushton | Telegraph.co.uk

Rupert Murdoch is facing a showdown with investors at News Corporation’s annual general meeting in October, after a group of 18 heavyweight investors signaled their intention to oust him as chairman.

The investors, who include Legal & General Investment Management, the Co-Operative Asset Management and Aviva, together control more than £1 trillion of assets and hold some 13.4m Class A shares in the blighted media group.