Dan Saladino and his dad Bobo (a former ice-cream man) talk Mr Whippy, 99s and Screwballs. Together Dan and Bobo (who also used to work in restaurants) have explored the wonders of pizza, and looked at the rise of 'Spag Bol,' Now they turn their attention to the history, science and magic of ice-cream on wheels.

Featuring John Dickie (author of Delizia and The Craft) and Polly Russell (British Library) on the history of ice cream.

Graphic novelist Matthew Dooley (who drew the image for this edition) talks about his book Flake, a drama set in the world of ice-cream vans.

Produced and presented by Dan Saladino.