. "The 20th London Regiment was a volunteer infantry unit of the British Army based in Blackheath. The unit had various titles from the time of its raising in 1859. The regiment served in the First World War before being converted to an anti-aircraft role in 1935."@en . . "The 20th London Regiment was a volunteer infantry unit of the British Army based in Blackheath. The unit had various titles from the time of its raising in 1859. The regiment served in the First World War before being converted to an anti-aircraft role in 1935."@en . "20th London Regiment"@en .