Cost of living in London (United Kingdom) is 42% more expensive than in Hamilton (New Zealand)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 6,272 prices entered by 1,406 different people.
For example, you would need at least NZ$9,669 (£4,990) in London to maintain the same standard of living that you can have with NZ$6,800 in Hamilton.