Should fast food be taxed?

The number of overweight and obese adults in developing countries has reached almost 1 billion according to a new report from British researchers.

The Overseas Development Institute says the figure has almost tripled since 1980. It says current alarming trends point to a huge increase in the number of people suffering with some cancers, diabetes, strokes and heart attacks as a result.

The BBC's Global Health correspondent, Tulip Mazumder, spoke to people in London about what their thoughts were on taxing unhealthy food in order to help curb the number of overweight and obese adults.