(One US study showed a 35% increase in the price of sugar sweetened drinks – working out at 28p per drink – in a canteen led to a 26 per cent decline in sales.
Dr Oliver Mytton and colleagues at Oxford University said so called fat taxes would need to be at least 20 per cent to have a meaningful effect on population health.
In the past year, Denmark has introduced a fat tax, Hungary a junk food tax and France a tax on sweetened drinks. Other countries, notably Ireland, are also considering such taxes.
I want to know why they're not considering a champagne tax or caviar tax.)