Broadcaster Piers Plowright explores five sound-worlds - some from far back in his life and some more recent - which still resonate with him.

In this fourth episode, Piers goes for a winter swim in the Men's Pond on Hampstead Heath and discovers how special the sounds are - wild-life, swimmers, the distant hum of London - on a January morning.

Produced by Alan Hall
A Falling Tree production for BBC Radio 4. Show less