Prince Harry and Prince WilliamPrince William and Prince Harry have begun a 1000 mile motorcycle ride across South Africa to raise money for charity.

The brothers are taking part in the eight day “endurance test” to raise money for Unicef, Nelson Mandela’s Children Fund and Harry’s own charity Sentebale (which helps disadvantaged young people in Lesotho). Riding Honda CRF 230cc bikes, they will cross more than 70 rivers and ride through “rocky and hilly” terrain as they navigate their way from Durban in the East of the country to Port Elizabeth in the south.

Speaking to reporters before setting off, Harry explained it won’t be an easy journey: “We never really knew what to expect, but by the sounds of things - the talks we were given last night - I went to bed shaking and didn’t sleep that well.

“It’s not just a bimble across the countryside, that’s for sure. It’s going to be very challenging and we’re expecting to fall off many a time.”

And it might also be a challenge hanging out with his brother for the whole time too: “We never really get to spend any time together.

“But it’s [going to be] great fun - well, I don’t know yet, we’ll have to tell you [afterwards]. We might argue [or] we might have a bit of fun. We’ll have to see how it goes, but we’re really looking forward to it.”

The Princes will travel in a group of 10 people - including their security staff - but will meet with other riders each night to camp out, often in inhospitable terrain.