Idina Menzel, famous for singing Let It Go from the film Frozen, provides the voice once more of Elsa, now Queen of Arendelle and still with magical powers, in the sequel Frozen 2. The singer discusses the early concept for her character in what became the biggest-grossing animated film of all time, and how Elsa has grown up in the years since the original.

The new Frozen 2 film has been long awaited but does the plastic merchandise brought out to accompany the film line up with its environmental concerns? Environment journalist Lucy Siegle takes stock.

The first UK retrospective of the work of Dora Maar opens at Tate Modern today. The artist, who died in 1997 aged 89, was best known for her provocative photographs and her surrealist photomontages, as well as her productive eight-year relationship with Picasso. Jacky Klein reviews.

Literary agent Clare Alexander and publisher John Mitchinson continue their discussions on how the publishing industry works, focusing today on where the power lies. There's no denying the influence of Amazon, but that's far from the whole story.

Presenter Kirsty Lang