The first two weeks of this half-term it is Fairtrade Fortnight: a great opportunity to get children thinking about where they spend their money and the difference that choice can make other people’s lives.

In 2009 I wrote a book about a boy called Kofi, who – as well as being a gifted footballer – was the son of cocoa bean farmers in Ghana.

The book is called Off Side.

At the beginning of the Off Side, Kofi’s family were being cheated and not paid a fair amount for their beans. By the end they had become part of the Kuapa Kokoo co-operative which supplies chocolate manufacturers Divine.

I was very lucky, when in Ghana researching my novel, that Divine took me to meet some farmers and to a school paid for by our buying Fairtrade Chocolate. I have seen the results of the decision we can make to buy Fair Trade chocolate: children being well-schooled, learning to run their own businesses and families living in decent accommodation.