Jacinda Ardern has announced her shock resignation as New Zealand Prime Minister, saying she "no longer has enough in the tank" to do the role justice.Ms Ardern on Thursday told reporters her last day would be no later than February 7.

Jacinda Ardern has announced her shock resignation as New Zealand Prime Minister, saying she "no longer has enough in the tank" to do the role justice.Ms Ardern on Thursday told reporters her last day would be no later than February 7.