Ramblings Radio 4, 3pm

Anneka Rice (right) says she feels out of sorts ts if she doesn’t walk every day. So, she’s the perfect person to join Clare Balding for the first in a new series. The e pair ramble along the he banks of the Thames, es as Rice explains why it’s a favourite route and why she feels the river helps to tether her.

In The Lost Sounds Orchestra (Radio 4, 11.30am) Mary-Ann Ochota meets people who are using the latest technology to recreate sounds from the past, including a professor who is reconstructing the roar of a T-Rex.

Free Thinking (Radio 3, 10pm) marks the upcoming 50th anniversary of Britain going decimal by exploring the physical and virtual life of money.