Our system for keeping planes in the sky dates back to the 1940s, and still relies on a patchwork of national authorities using radar and VHF radio.

Vivienne Nunis asks whether its time for a complete overhaul. That's the objective of Andrew Charlton, of lobby group the Air Traffic Management Policy Institute, who says the organisation of airspace and the technology deployed are worryingly antiquated.

It is an objective shared by the European Union, which has long aimed to knit its dozens of authorities into a "single European sky". Thomas Reynaert of industry body Airlines for Europe explains why the EU has still failed to deliver on this promise.

Meanwhile Vivienne speaks to one of the most technologically advanced air traffic control operators in Europe, the UK's semi-privatised Nats. Jamie Hutchison runs one of its main control centres, while Fran Slater has been working the screens there for over two decades.

(Picture: Aair traffic controller looking at screen; Credit: 18percentgrey/Getty Images)