In the 50s we used to sleep eight hours a night. Nowadays the average is six and a half. Why have we become less keen on a proper night’s keep? Does our modern lifestyle promote sleep deprivation, meaning we’ll stay awake as long as it takes to consume as much online as possible?

With half a billion wearable devices shipping in the next few years and going straight onto wrists, shoes, glasses and lapels, soon interacting with smart cities will seem as 'normal' as checking Facebook.

The number of sleep-deprived people in Britain has risen by 50% since the start of 2013. Researchers believe the shift could be related to the use of smartphones and tablets before bed, with studies showing that 80% of Brits use smart devices directly before sleeping.

If you're planning a holiday, you'll probably have seen targeted advertising based on your browsing history. Vodafone targeted its roaming packages at people it knew were jetting off, and increased sales by 196%. But can data create more complex behaviour changes?