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Hello, I'm Ali Forteskew.

This is Sky News' daily podcast.

Unfortunately, Neil isn't here today.

He's not feeling very well, but he hopes to be back next week.

And he is missing a pretty extraordinary day because we've watched the impact of an IT outage unfolds all around the world.

GPs, hospitals, airlines, banks, supermarkets, broadcasters, not least us here at Sky News,

have been grappling to function, really,

and it's been called by some the biggest IT outage of all time. We were affected, as I said,

and you might have been watching Sky News this morning. Our early morning shows couldn't get on air,

and eventually my colleague Anna Jones appeared with one camera and some handwritten scripts. We did our best to

keep everyone informed, of course, but we couldn't rely on the systems that we so often do rely on.

So we're going to talk to our science editor, Tom Clark, about what calls this all and the sort of

science and technology behind this. Tom, I mean, it was just a pretty extraordinary morning.

...