I wish people would stop comparing the UK and NZ...
New Zealand is 10% bigger by land mass yet has 13x less populace. NZ also isn't a hub of international finance and trade.
So whilst it's very viable for NZ to lockdown each individual flight to their country, it isn't quite as viable for us. And even if we did that, NZ would still have an easier time than us with COVID due to sheer population density.
They aren't comparable countries in any way, shape or form in relation to COVID.
Been my point too.
Same with Aus, though Melbourne is slightly more of a hub there (and no surprise to see that was the most hard-hit place in Aus).
It's 2.5 hours flight from Sydney to Auckland (I know, I've done it).
There's around 1.8m people in the Auckland region - nearly half of NZ's entire population. On the south island (
@Toffee in Jandals can back this up) the drive from Christchurch down to the tourist hotspot of Queenstown is around 9 hours IIRC. And you pass through about four tiny towns on that drive.
They have done brilliantly and it's a testament to their PM, who has had to deal with some horrific stuff in her tenure (the Christchurch shootings for example). Think we can all agree that we'd rather have her than Johnson.
However, if you could pick a country that would be able to effectively control a pandemic just based on location, population, the fact that it's in no way a transport or trade hub, then it'd be NZ.