Last month, as volcanic ash drifted across the skies of Europe, I found myself in a van travelling from Dubrovnik to Antwerp with a Belgian, a German, a Turkish couple living in Holland, a Russian studying in Dublin, a Chinese woman heading to Beijing via Amsterdam, and two Croatian drivers whose services we had hired. How did we communicate? In English, of course. That "of course" is the starting point for Robert McCrum's book, an account of how English achieved its present status, framed by an argument about the present and future consequences.
She goes on to discuss whether McCrum's book is just another addition to the flag-waving and patriotism that appears in some other accounts of English's rise to international power and decides that it probably is. More important to Cameron is what McCrum doesn't talk about: the unequal access to English around the world and the different values placed upon different varieties of the language. This last point chimes in with many other arguments about English as a Lingua Franca and/or English as a World Language, and it's an area that's worth a look if you're an A2 student thinking of Language Discourses around this topic for your ENGA3 exam in a few weeks.