ACC Minister Judith Collins has welcomed a new investigation into the leak of the email she received from former National Party president Michelle Boag which helped end her colleague Nick Smith's ministerial career.
Confirmation that Privacy Commissioner Marie Shroff will investigate the email's trail from Ms Boag to an eventual report in the Herald on Sunday came as Labour claimed Ms Collins, National Party operative Simon Lusk and right-wing blogger Cameron Slater all played a part in the leak.
In the email, Ms Boag set out her account of a December meeting she attended between ACC claimant and former National Party insider Bronwyn Pullar and senior ACC managers.
All recipients of the email, including Ms Collins, ACC chief executive Ralph Stewart and ACC chairman John Judge have denied leaking the email to the Herald on Sunday.
The Herald on Sunday's report named Ms Pullar as the woman at the centre of a major privacy breach at ACC and identified Ms Boag as her support person at the December meeting.