I disagree. The UK’s economy is far more international than New Zealand’s. The U.K. ranks 4th worldwide for international travellers per capita, and New Zealand 38th. Shutting down air travel to the financial centre of the world would have been an incredibly risky move at the time. It may have been the right move in hindsight, but at the time it was far easier for the tiny island on the edge of the world to even consider doing it.