Last time I visited London, I found out that London Transport Museum offers Hidden London tours, so I signed up for one. It was fantastic, and luckily they were offering another tour while I was here again. This time, they offered a tour of Clapham South subterranean shelter that was built during World War II. When the Germans bombed London during 1940-1941, some people took shelter in London Underground stations, which the transport authorities didn’t really want them to do. The government then asked them to build proper shelters for people. The transport authorities had previously had plans for an express train to run underneath the Northern Underground line, so they used parts of those plans to plan ten shelters to each shelter 10,000 people underneath Northern line stations. Only eight stations were built though, and London Transport Museum now owns one of them, the one that that was built under Clapham South station.
The shelter is 11 stories underground and has over a mile of subterranean passageways. It is accessed via a spiral staircase with many, many steps. [We had to walk down them and then back up when the tour was over.] The shelters were built just like London Underground tunnels with the idea that after they were no longer needed as shelters, they could be used to start construction of the previously mentioned express lines. That never happened though. The tunnels were all divided in half horizontally, so that they formed double-decker shelters. Each level was then divided into eight sections all given names of historical people, with rows and rows of beds. People would be assigned a bed and told which section and which bed number was theirs. The shelter were not finished before the end of the Blitz, but they were used later when V-1 and V-2 bombs hit London. Government propaganda advertised them as “luxury tunnels” with “comfortable canteens.” Those terms are kind of relative. The beds were small and really close together. They did have lavatories, but the toilets consisted of buckets with a possible seat. The buckets were emptied into a tank. This is my favorite part (especially as an engineer), when the tank needed to be emptied, a valve was turned to add compressed air, and another valve was turned to allow the compressed air to (hopefully) shoot the waste up into the sewer tunnels above. However, the shelters certainly kept people safe from bombs. Some people who stayed there had no other place to go as their home was destroyed.
After World War II, they continued to be used at different times. In 1951, there was a huge festival in London, and the shelter was opened as “Festival Hotel.” Also, Caribbean migrants arriving on the Empire Windrush stayed there temporarily. Finally U.S. troops stayed there in the 1950s. Some of the shelter were later used for archiving material.
Exterior of entrance with spiral staircase inside
Clapham South Tunnel/Shelter
Sign with directions to exit, other shelters, and lavatories
Shelter beds
Stairs to Underground station
Tunnel walls
Graffiti on tunnel walls (the yellow dot sticker is there because the museum is a museum and now preserves the historical graffiti)