He was closely associated with Robert Maxwell,[3] and was the centre of considerable UK media attention in 1991 after he was accused in Seymour Hersh's book The Samson Option of involvement in Israeli arms deals and of passing the location of Mordechai Vanunu to the Mossad.
[4] Davies began his career with the Birmingham Post and Mail, and joined Mirror Group Newspapers in 1961 as a foreign correspondent and investigative reporter.
Davies was the first in the mass media to identify the victim of the 2007 royal blackmail plot, despite a court order preventing the person being named in the United Kingdom.
[12] Davies was named by Ari Ben-Menashe as his business partner in Profits of War, in relation to Iran–Contra and the sale of PROMIS, the first computer spyware.
The arrangement was also noted in the book Robert Maxwell, Israel's Superspy: The Life and Murder of a Media Mogul by Gordon Thomas.