Prince Harry was 'terrified' by South Pole charity trek

Harry's South Pole Heroes will be broadcast on ITV on Sunday March 16 at 8pm. Credit: ITV

Prince Harry was "terrified" ahead of his gruelling charity trek to the South Pole and concerned about letting the side down .

Harry, who was filmed for an ITV documentary - Harry's South Pole Heroes - about the Antarctic adventure, was determined to keep going during the Walking With The Wounded expedition.

The team, including 12 servicemen and women from the UK and other nations, trekked more than 200 miles across the bleak continent to the geographic South Pole in December last year and experienced freezing temperatures of as low as -45C.

The first episode of the ITV documentary will be broadcast this Sunday.

Ahead of the trek, Harry revealed his concerns, according to this week's edition of the Radio Times:

I'm terrified for myself, to be honest - hugely daunted. I don't want to let the side down through fitness or injuries or anything like that.There's a lot of pressure on everybody involved, so I've just got to get it right... It's not just about fitness, it's about knowing exactly what you can and can't do. For me, it's bigger than just these guys.We're trying to raise money but also to raise awareness for the fact that the injuries they've sustained they're going to carry for the rest of their lives.

The prince also spoke of how he was inspired by his fellow team mates.

"Regardless of what your injury is, or whether you're military or civilian, (and) even if you lose both your legs, you can still carry on. You've just got to push on, you shouldn't give up - and these guys don't. That's what's driving me," he said.

Major Kate Philp, who became the first female British soldier to lose a leg in combat, told the Radio Times how Harry would try to encourage her to keeping going:

There were a few times on the trek where he came to ski alongside me for a few miles to give me moral support. Or he'd come up and say, 'Half the day gone, just another half to go,' to try and keep my spirits up. He was very good for morale.It's very clear that he cares a lot about people who have been injured in a job that he loves.

Harry's South Pole Heroes will be broadcast on ITV on Sunday at 8pm