From the BBC World Service: Hundreds of thousands of workers across swathes of the U.K.’s infrastructure have begun walkouts, which are set to stretch right through the Christmas period. It’s part of a wider picture – frontline workers feeling the cost-of-living squeeze who feel their pay needs to rise to meet those costs. Also, as part of our series on the invention of the transistor, we look at the significance of the transistor radio to Africa.