Looking forward to an extra hour in bed on Sunday? Time to thank a farsighted builder from Kent

William Willett dreamed up the idea of clocks going forward and back on an early morning ride in 1907

For many people, it will simply mean an extra hour in bed. For others, it's a disruption to their circadian rhythm that can take weeks to fix.

On Sunday at 2am, clocks in the UK will go back by an hour, a practice that has been mandated by law for more than a century.