David Sedaris, the American author and comedian, takes Clare Balding on a litter-picking walk in West Sussex.

When David Sedaris was a child he would clear up around the house, and keep his own bedroom perfectly tidy. This obsession has, in recent years, been transferred to the outdoors and Sedaris is now a devoted daily litter-picker, cleaning the roadside verges of Pulborough and the surrounding area.

Clare imagined that this edition of Ramblings might take her across the South Downs, occasionally reaching for a stray bottle or piece of paper. In reality it involved walking less than two miles, and filling six bin bags full to bursting with all manner of filthy rubbish. All while wearing a fetching hi-viz jacket. A very unusual edition of Ramblings!