Hello, I'm Vivienne Nunes. Welcome to Business Daily from the BBC.

There are said to be around 10,000 planes flying above us at any one time. So who's policing the traffic in the sky?

I look at a radar screen, which is a little bit like a TV screen, and it's got little asterisks on the screen which represent each of the different planes that are in the sky.

But calls are growing louder for air traffic management

to be completely overhauled and modernised.

At the moment, every single flight, every single aeroplane is lovingly hand-carried across the sky,

as if it's some artisanal cheese or something that's been handmade and handcrafted.

And at a time when the volume in the sky is going up and up, we just can't keep on doing it that way.

That's all in Business Daily from the BBC.

I'm standing on the roof of the BBC building in the heart of London and there's quite a lot

of traffic on the road beneath me, some red double-decker buses, all sorts of cars and

trucks, slowly making their way past the BBC. But if I look up, there's also quite a lot of

traffic in the clouds above me. On a clear day, you can often spot four or five planes from

here, some of them flying solo, I can make out the logo on their tail or the name of the airline

painted on the undercarriage. Some planes, though, are much higher up, just small white dots,

presumably on their way to somewhere in North America or Europe.

With so many planes crisscrossing the skies, I've often marvelled at the fact that they never

run into each other. And that's all down to air traffic controllers like Fran Slater.

I work sort of fairly big geographical sectors of airspace. I look at a radar screen, which is a little

bit like a TV screen, and it's got little asterisks on the screen which represent each of the

different planes that are in the sky. And I work a proportion of those, and I set them going out on

their way out to Europe or out towards America. And I work the opposing inbound coming in as well once they get

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