In this episode we weigh up the benefits of a cup-holder that’s convenient as you drive yourself to the local diabetes clinic, Dr G introduces us to a headrest air freshener that gives you that great new-neck smell, and we discover a device that guarantees to keep you awake at the wheel - even if you’re listening to Coldplay.

In Innovation time machine, we remember how citizen’s band radio brought the world a level of sparkling wit, high-brow banter and misogyny that have all but vanished from today’s world of motoring.