Gallery: Celebs continue Comic Relief Trek

The nine celebrities have reached the half-way point of BT Red Nose Desert Trek across Kenya's Kaisut Desert. With over 50 kilometers walked, the group are now feeling the full effects of their challenge. Olly Murs has been hit with a "severe case" of chafing, while Dermot O'Leary's blisters had to be drained of blood. Click along the gallery below to see how they and others including Lorraine Kelly, Peter White, Scott Mills and Nadia Sawalha are getting along.