A typical family premium (two adults in their 40s and two children under 10) can vary from £700 to £1,800 a year.
The average price of a private healthcare policy in the UK is £1,032.84 per year (February 2022)
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I did use the word "taxpayer". The UK's health service costs £2700 per head of population. Obviously what people contribute towards that varies.
Also my question remains unanswered. Is the Dutch health system topped up by government funding?