On the centenary of the death of Antarctic explorer Sir Ernest Shackleton, we’re joined by senior historian Howard Spencer to discuss Shackleton’s adventures and the blue plaque that commemorates his achievements at his former London home. We also discuss the exploits of five other polar explorers honoured by blue plaques for their commitments to mapping the globe and pushing the limits of human endurance.

To learn more about English Heritage’s blue plaque scheme, go to www.english-heritage.org.uk/visit/blue-plaques