Between 2004 and 2011 MOD employee Bettina Jordan-Barber, was paid information which formed the basis of a series of news stories in The Sun, reports The Telegraph.

The Crown Prosecution Service also announced that Andy Coulson has been charged with illegally paying for information from Buckingham Palace’s internal phone directory, which includes home numbers for senior royals including the Earl of Wessex and the Princess Royal.

Coulson, who used to edit the now defunct News of the World, is to be charged with two conspiracies, alongside the paper’s former Royal Editor, Clive Goodman.

Coulson and Brooks have also been charged with conspiring to hack the mobile phones of more than 600 people. Brooks has also been charged with perverting the course of justice in connection with the phone hacking investigation. She has been charged with misconduct in a public office and breaching the Official Secrets Act.

The charges follow investigations conducted as part of Scotland Yard’s Operation Elveden, which the Metropolitan Police has previously estimated will cost around £40 million.