[MarkWaldorf]

A couple of the contestants taking part in I'm A Celebrity... Get Me Out Of Here! have reportedly been challenged to swim to a deserted island through shark-infested waters.

The 11 stars were asked to board a luxury yacht so they could be whisked away for an exotic photoshoot, The Mirror reports.

However, presenters Ant and Dec later revealed that there was a twist, and the group was asked to choose one man and one woman to swim to a desert island through shark-infested waters.

Executive producer Chris Bogden said: "We've had to increase the safety equipment for this challenge to go ahead.

"We upped the sonar surveillance on the boat and we made sure that there are shark nets surrounding the island - but the celebrities don't know that. Great white sharks have been spotted in the area recently."

The names of the chosen celebrities are a closely guarded secret, but the trial will be aired on the first show of the series at 9pm on ITV1 tomorrow.

Source - DS