We will be passing, and often ignoring, some of London's most famous buildings and attractions. Instead we are exploring the hidden history of the landscape around you through the voices of the people who lived and still live here. Towards the river you will see a building with a glass dome. This is Greenwich foot tunnel. It used to be used by thousands of dockers to get from their homes to Mill Wall and the West India docks on the other side of the river.

Listening to these recordings, I discovered that the foot tunnel was also used as an air raid shelter in the First World War. It was used to shelter dockers' families from the bombs dropped by German airships, Zeppelins. But on this walk you don't have to take my word for it.