By politics.co.uk staff
The private investigator convicted of phone-hacking for the News of the World must give evidence about other journalists at the newspaper involved in the illegal practice, a judge has ruled.
The ruling comes after comedian Steve Coogan and sports commentator Andy Gray brought forward a civil suit.
Both claim to have had their phones hacked by Mr Mulcaire and are suing the News of the World for breach of privacy.
Lawyers for the claimants will ask the private eye to name the journalists who ordered him to hack their client's phones.
Mr Mulcaire will have to divulge details of who instructed him to hack into celebrity's voicemails and who he then gave this information.
He must also explain how he acquired the pin number to Mr Gray's voicemail and explain how the sports commentator's name was on his list of intended targets.
The private detective will be asked to provide this information in six civil cases currently in the courts.
Mr Justice Vos said there was "abundant evidence" that Mr Gray's phone had been hacked.
The high court judge dismissed Mr Muclaire's claim that he could not give evidence for fear of incriminating himself and ordered him to divulge further information about the set-up at the newspaper.
Glenn Mulcaire was jailed for six months in 2007, after being convicted for hacking into the voicemails of aides to the royal family, along with the News of the World's royal editor Clive Goodman.