Lucy Watson talks to our Science Correspondent Martin Stew in Antarctica as he joins a team of scientists on a vital research mission on the so-called Boaty McBoatface - or the Sir David Attenborough.

Making history as the first British journalist to go this far south in polar winter, Martin describes the incredible, but also alarming, change unfolding around him.

He also tells of the scientists’ hope that the grim prognosis for our planet can be turned around.