Trapped History reveals the hidden stories of unsung heroes. But as we hit mid-season, we thought we'd do something slightly different: look at a whole bunch of unsung heroes. The Memorial to Heroic Self-Sacrifice in fact.

Join us as we leave the studio and venture out into wintery London to find out about this fascinating place. It's Victorian, but not as you know it – there's no pomp, there's no circumstance. Instead, this is a memorial to ordinary people who did extraordinary things.

The artist and sculptor Ian Wolter leads us through the complex world of memorialisation and remembrance as we learn about the man behind the Memorial, the people on it and what it teaches us about memory today.

Tune in also to hear the powerful story of Ian's nominee for the Trapped History Hall of Fame.