Need a flying taxi? These two firms can get a cab to you 'by 2022'

Air travel is set to be transformed sooner than you think as firms unveil vertical takeoff electric prototypes

While conventional airlines struggle for more environmentally friendly alternatives to jet fuel, a host of startups are betting on zero-emission flight using electric power.

They will not carry a hundred passengers across the Atlantic - but in the global race to develop an air taxi, two firms - one British and one German - have unveiled significant recent breakthroughs this month.