Both men, who intend to pursue damages claims, had been told by the Metropolitan Police that there was evidence their phones may have been hacked.
The “target list” was included in notebooks seized by police in an investigation which led to Mulcaire being jailed for intercepting voicemail messages of members of the Royal Household in 2007.
Mulcaire had claimed that handing over the list would breach his right to avoid incriminating himself, but the judge threw out his argument. It means Mulcaire will not only have to divulge the names of people whose phones he hacked, but could also be forced to tell a court who asked for the information and who received it.
The judge said: “I think the identity of the other targeted names and the people who helped identify those names, and the manner in which it was done, will be relevant to the conspiracy between News Group Newspapers and Mr Mulcaire that is alleged.”
The “target list” is thought to include Max Clifford, the publicist, and Gordon Taylor, the former head of the Professional Footballers’ Association, both of whom have received payouts from the News of the World.
Mr Justice Vos said in his ruling that there was "abundant evidence" that Mr Gray's voicemails were intercepted and a "strong inference" that misuse was made of the confidential information.
He added that it was also fair to infer that Mulcaire had the ability to intercept Mr Coogan's telephone and was likely to have done so.
A total of 14 people are currently suing over alleged phone hacking, including the former England footballer Paul Gascoigne, the politician George Galloway, the actress Sienna Miller, and interior designer Kelly Hoppen.
Almost 3,000 people whose names were found in Mulcaire’s notebooks will be contacted by police in the coming months, though in many cases there is no direct evidence of phone hacking. Mulcaire was given permission to appeal against the decision. http://www.telegraph.co.uk