The Train At Platform 4

Radio 4, 11.30am

Hugh Dennis and

Steve Punt write and occasionally guest-star in this new sitcom set aboard a crosscountry rail service.

However, it’s Rosie

Cavaliero (right) in the lead role of train manager Sam, who has high hopes for her maiden voyage – which, unfortunately, are set to be dashed.

In Fungi: The New Frontier (Radio 4, 11am) Tim Hayward finds out why new research into seemingly humble fungi is changing our understanding of life on Earth while also offering solutions to some of our biggest challenges.

Late Junction (Radio 3, 11pm) has music by multi-instrumentalist Park Jiha and composer Pan Daijing.