Grylls, who has taken celebrities including Zac Efron, Kate Winslet and Jake Gyllenhaal on survival style trips, met with Cameron to highlight a scheme at the Oaklands Outdoor Centre in Snowdonia, Wales on Friday (07Aug15).

The scheme, which is part of the National Citizenship initiative and teaches 16 and 17 year-olds new skills, has grown by around 200,000 teenagers since it was launched in 2010.

Grylls says, "Seeing it growing like it is, is really exciting," and Cameron adds, "This is something that should be available for every child across the country."