Two nonagenarians, born within a month of each other, showcase their love of the planet tonight on ITV. Sir David Attenborough and The Queen tour the gardens of Buckingham Palace enjoying a warm and witty conversation in The Queen’s Green Planet.

Whether discussing conkers, laughing at a wonky tree that “someone sat on” or joking about Donald Trump, the duo make quite the double act, and their relaxed conversation is at the heart of a documentary showcasing The Queen’s Commonwealth Canopy – a project launched in 2015 to preserve indigenous forests and create a network of sustainable conservation projects across the Commonwealth.

The Queen hopes the tree-planting programme “might change the climate again”, which Attenborough agrees would be “a wonderful legacy.”

Joining Sir David and the Queen in the programme are Prince William, who visits Canada’s Great Bear Rainforest, Prince Harry planting trees in the Caribbean, and Angelina Jolie in Namibia.

A final word to Hollywood star Jolie, who describes how she explained to her own children about why the Queen is planting trees in Africa.

“She’s just this really lovely lady who really cares about people around the world, and she really cares about the future, and she wants your grandkids and her grandkids to be able to be running around, enjoying nature and other cultures,’” says Jolie. “She thinks that really matters, and I agree with her.”

The Queen’s Green Planet airs Monday April 16 on ITV at 9pm. The Big Issue Earth Day Special is out now.

Main image: ITV