So people

To reduce costs I want to bring over things like my iron, kettle, toaster basically my small electronics would they work over there proving I have a plug converter?

simple answer, Yes

Brilliant I like it when people keep it simple

Bring a a uk socket strip (or two) then just change the plug on the end to a nz one (lot cheaper than using individual converters).

Yip bring everything. The plug adapters are ok temporarily to get you by the first week or two but get very worn and start falling out of the wall socket. Best bet is to buy several replacement nz plug tops and change them yourself. They're $3.49 each in countdown supermarket.

We still use 3 adapters & they are fine, after nearly 11 years
I got a bag full of old plugs from a second hand shop for a dollar, better than the bendy monkey metal pinned ones they sell nowadays

The toaster and my hairdryer still have their UK plugs on them using an NZ adaptor each after living here for over five and a half years.

The Christmas lights are UK plugs too. The computer, printer etc is a mixture of NZ and UK plug sockets with UK adaptors.

Mains electricity in NZ is similar enough to the UK (slightly lower voltage but that is not worth worrying about) that the appliances will work - different plugs though (just don't ask the locals about fuses or earth wires use an adapter with a surge protector on it).

ONE MORE POINT! - a toaster won't need a surge protector but more sophisticated devices will.

Nope it's the same. NZ nominal volts is 230v and frequency 50hz just like the UK, or at least that's what I've been giving out when I'm on shift 😉

But if you're shipping stuff over what will you use in the interim? You'll have to buy those things anyways whilst you wait so why not just ditch them and buy brand shiny new ones when you first arrive here.
Honestly the electrical stuff we brought with us I wish I hadn't bothered. I should have just brought large quality furniture and a sh*t load of carpet rolls.

Our old stuff has nearly had it.....was thinking hot January or summer sales to get new stuff

Electrical stuff I've found is often cheaper over here in NZ.
Just buy a really good sofa and beds in the UK and maybe empty your local Ikea market place for kitchen gadgets, picture frames etc and then buy the rest here (maybe toss a couple of really good quality rugs in the container too)
NZ Sofas 'SUCK!' they're over stuffed tacky and cheap. Anything elegant or sophisticated and grown up is way overpriced here so buy them in the UK and bring here.

Also don't forget to get a flybuys card before you buy anything here, it's not as good as it was as they've increased the points you need to get anything but if you're buying major big household stuff it will still be useful. Oh and a Farmlands card (a co-op) is also good for electrical stuff as often you get a ridiculous discount on many items, you do have to buy shares but it still pays off.

Brilliant will look into both of those