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To prepare for the early starts, Natasha admits that she now goes to bed at 8pm each night. She gets up at 3.20am the following morning.

"You do have to make enormous sacrifices for the job," she says. "All my social life has gone to lunchtime."

The view from the presenter's chair

Dermot gets up slightly later - but he still aims to be in the office for a 4.30am meeting with the editor of that morning's progamme.

"We're just the tip of the iceberg," he says. "Below that there are lots of people. It's a 24-seven operation and we would be absolute toast without them."

The tight schedule leaves a little more than an hour for the presenters to read the briefs on the interviews they'll conduct during the programme - and to get themselves spruced up for TV.

For Dermot, it also means a chance to catch up with some old TV favourites, while waiting in the green room for a free slot in the makeup chair.

Of course, there's no time for secret soap-watching once the programme is on air.

The production team works through the night

From 6am to 9am each morning, the presenters are on their own kind of journey, where almost anything can happen.

Just call me dad

That includes having to interview your own father, as part of a breaking news story - as Natasha discovered in May 2003.

"That was definitely my worst moment," says Natasha. "I just blushed and I kept calling him dad," she says. "He was really cool and answered all his questions really efficiently like a proper journalist - and I just fluffed it."

So - how to sum up the job of presenting one of the most fast-moving live TV programmes?

Natasha says: "It's almost like going on a long-distance flight. You metaphorically strap yourself in with a seat-belt and say we're on air now."