Fifteen million people in the UK are disrupting their sleep patterns by looking at their mobile phones and other devices, with a third of them checking for messages at night and more than a sixth replying to them, according to a survey by Deloitte.

Paul Lee, head of technology, media and telecoms research at Deloitte, explains why smart phones are still a 'novelty' and will become less a part of our lives in the future.

(Image: Mobile Phone. Credit: Thinkstock)