Michael Gove has vowed to take action over plastic pollution in the oceans after being "haunted" by Sunday night's episode of Blue Planet.

In the episode, which drove some viewers to tears, a pilot whale carried the carcass of its dead baby around for days.

Sir David Attenborough, narrating the episode, suggested the calf was poisoned by its mother's milk, which could have been contaminated by plastic pollution.

Also in the show was a baby turtle, which crew members saved after it became tangled in a plastic net.

Michael Gove wrote on Twitter: "Still haunted by last night's #BluePlanet2 - the imperative to do more to tackle plastic in our oceans is clear. We @DefraGovUK will work urgently to identify further action."