BBC One’s Animal Park returns for its 20th series this week, with Kate Humble back at Longleat in Wiltshire to visit its array of fascinating animals. Kate, 54, who launched the show back in 2000, admits that she’s starting to feel like “everybody’s great-granny”. “It’s like a family reunion, because a lot of these animals and keepers I’ve known for a very, very long time,” she says.