Why are so many workers going on strike?

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It's shaping up to be a winter of industrial strife. Tens of thousands of workers have downed tools to request pay deals that keep up with the rising cost of living. Train and postal services have been disrupted, there have been school closures, gridlock in the courts, overflowing bins – and in a sign of the times, even nurses have voted to strike for the first time ever. Further walk-outs are likely in the future as well – as doctors and civil servants air disputes with their employers. So why are so many people going on strike? The BBC’s Employment Correspondent Zoe Conway has the answers to 5 key questions. Image Credit: Anadolu Agency via Getty