"In the end, I'm not wanting to be the one that stands in the way of people having some choice," he said.
It is effectively a concession by Mr Key that the process was not perfect but it is also a blow for Labour which lost the chance to force the change itself. Instead the Green Party will get that credit. Labour's Andrew Little put the blame on Mr Key for acting in bad faith, saying National could have made the change without Labour's support.
Green co-leader James Shaw said it was absurd National had not moved on Red Peak given he could have substituted it for another design without a law change. "The fact that Labour have had a go, we have had a go, to get it through the process is kind of absurd, because [Mr Key] always had that option."
Fans of Red Peak started agitating for its inclusion after it was left off the original shortlist selected by the Flag Consideration Panel - culminating in a petition with 50,000 signatures which was presented to Parliament last week.
Its abstract design is not for everyone - NZ First deputy leader Ron Mark compared it to Nazi symbolism yesterday. Despite its popularity in recent weeks, Red Peak will also be up against the popular and well known Kyle Lockwood silver fern designs. However, there are hopes its last-gasp inclusion could help shift some opposition to the flag change process. A 3 News Reid Research poll this week showed that after seeing the four flags, 70 per cent of people did not want change.
The first referendum in November and December will ask New Zealanders to rank the alternative flags. The winner will then run against the present flag in a second referendum in March.
Key U-turns
Red Peak. A fortnight after point blank ruling out a law change to add Red Peak to the flags referendum shortlist, Prime Minister John Key caved in and cut a deal to push it through.
Syrian refugees. After saying New Zealand would wait until the middle of 2016 to assess whether to take more Syrian refugees, local and international pressure prompted Key to announce an extra 750 refugees over three years..
Capital Gains Tax After panning Labour's capital gains tax policy for two elections, National's May 2015 Budget introduced a 'bright line' capital gains tax on investment properties bought and sold within two years.