A tumultuous year in NZ politics: Take a look back at 2015

U-turns, back downs, or just listening to the voter - whatever you want to call it, the year in politics had plenty.

Issues in 2015 included the flag debate and the refugee crisis. Source: 1 NEWS

Prime Minister John Key went from no response on the Syrian refugee crisis, to an extra 600 places.

He rejected a social media campaign on the Red Peak flag before passing an urgent law change allowing it on the flag referendum ballot.

Then the previous rejection of a captial gains tax became a budget announcement of a new tax on property gains.

Meanwhile Labour leader Andrew Little withdrew his party's long-held opposition to 90-day work trials and quickly dumped its policy to raise the pension age.

He also apologised for calling Parliament's Speaker David Carter biased.

The year started with plenty of drama with National MP Mike Sabin's resignation sparking the Northland by-election which National lost to New Zealand First.

Sam Lotu-Iiga lost his Corrections portfolio in the fall-out over Serco's Mt Eden Prison mismanagement and Serco lost their contract to run the prison.

But 2015 also had its share of winners with Judith Collins getting back her place in cabinet, taking over the police and corrections portfolios.

And Winston Peters won the Northland by-election.

The year rounded off with New Zealand signing up to a groundbreaking pact to reduce global warming.