Whenever I want to travel back in time to my 1970s childhood, all I need is a glass of Lucozade. One sip of the electric orange nectar and there I am in the magical era of Chopper bikes, space hoppers and clackers (which they banned because they were dangerous, apparently), of the Clangers, Animal Magic and John Craven’s Newsround, of Wagon Wheels, Alphabetti spaghetti and chewy chocolate peanut bars still known in those days by their correct name, Marathon.