Mr Key says the resignation of Ms Collins followed the receipt of new information that raises allegations about Ms Collins’ conduct as a Minister.
“The relationship between a Minister and their Chief Executive is vital, and goes right to the heart of a trusted, effective government.
“This new information suggests Ms Collins may have been engaged in discussions with a blogger in 2011 aimed at undermining the then Director of the Serious Fraud Office. Ms Collins was the Minister responsible for the SFO at the time.
Mr Key released an email which had been recently been provided to his office.
“I have spoken with Ms Collins about the matters in the email, and she strongly denies any suggestion of inappropriate behaviour on her part.
“Ms Collins accepts these are serious allegations and that resigning as a Minister is the honourable step to take in these circumstances.
Mr Key says Ms Collins resignation takes effect immediately, and Hon Christopher Finlayson will be Acting Minister of Justice, Hon Craig Foss will be Acting Minister for ACC, and Hon Hekia Parata will be Acting Minister for Ethnic Affairs.