The vast majority of the UK's health expenses flow through the NHS. This gives NHS the power to demand prices that are lower than they would be if there were ma

The vast majority of the UK's health expenses flow through the NHS. This gives NHS the power to demand prices that are lower than they would be if there were many competing insurers. That is effectively a price control. If you don't agree to accept the NHS's price, you're left with few, if any customers.