How do you charge a driverless vehicle?

One vision of future mobility promises swarms of electric fully autonomous vehicles (AVs) zipping around dense urban centres dropping off goods and people 24 hours a day, seven days a week. If realised, this setup could unlock efficiency and safety gains simply unattainable with today’s human-driven fleets. However exciting this picture seems, a key question remains: how will these driverless electric vehicles (EVs) be charged?