Steve Caplin looks at the new service to choose your own flavour of KitKat - for a price. He has news of how fast our thumbs are getting, of earbuds to help you get the most out of the sound at a concert, of the new warnings on e-scooters, of a clever new suitcase that charges your phone as you wheel it, of why high rooftops are being bought up in London and why workers in the UK are sabotaging robots.
