New Zealand politicians are split on the prospect of Britain leaving the EU.
Act, NZ First and the Maori Party prefer a Brexit, but National, Labour, the Greens, United Future want Britain to remain in the union.
United Future leader Peter Dunne said he was strongly in favour of the "remain" camp, and said New Zealand would be "caught in the crossfire" of a Brexit.
After taking a surprise lead in polls a week ago, enthusiasm for the leave vote has slipped ahead of tomorrow's referendum.
NZ First leader Winston Peters attributed that change to the murder of British Labour MP Jo Cox. He said a Brexit was "our best chance to reverse the steady loss of access rights Kiwis have in the UK".