Despite the difficult circumstances, in an oral history played out loud to visitors, Margaret reminisces fondly about her time in the shelter.
“I had a wonderful time,” she explains. “I was an only child, and I made friends. We used to rush up and down the tunnels.
“People were all in the same boat down there. It was a great leveller. Whether you were rich, poor or whatever you were. If you were homeless.
“People were very kind to each other, much more than they are now. It’s funny isn’t it, that it takes a war to do that.”
After the end of the conflict, the shelters continued to be used as cheap hotel accommodation costing three shillings a night, equivalent to £4 today.
Guests at Clapham South included those who arrived in Britain from the Caribbean as part of the Windrush Generation.
But in 1956, after a fire at the Goodge Street station shelter, the Government decided to abandon the tunnels.
Today, they are mainly used as archive storage, although the tunnels under Clapham Common once housed a hydroponic farm.
For anyone who wants to check out the shelter themselves, new dates for the ‘Hidden London’ tour were released earlier this week, with tickets costing £38.