Updated 3.02pm: John Key has named the staff member in his office who was briefed by the SIS over the release of emails to blogger Cameron Slater.

Following an intervention by the Chief Ombudsman, the prime minister has identified him as former deputy chief of staff Phil De Joux.

The Prime Minister had previously said he would not release the name as it was not in the public interest, however the Ombudsman overruled him.

Labour believes the latest developments in the SIS OIA release to blogger Cameron Slater proves the Prime Minister has had something to hide.

Demands are being made for the PM's former chief of staff to front an inquiry into how the SIS released information to blogger Cameron Slater.

Labour MP Phil Goff, who was the subject of briefing papers released by the SIS, says Mr De Joux now needs to go before the Inspector General of Intelligence and Security's inquiry to explain his role.

"Clearly it was leaked to Whaleoil, and if Mr de Joux was the person who was briefed then he must be the prime suspect, for having leaked that information."

Labour Leader David Cunliffe says it proves the manipulations went to the highest levels of Mr Key's office.

"The public has a right to know when the Prime Minister's Deputy Chief of Staff is giving instructions or requests to the SIS. This is a sensitive role, it must be above board and beyond reproach. He must have kept Mr de Joux's name secret because he is such a senior staffer."

Mr De Joux finished working for the Prime Minister in 2012.