the scrollwork at the top of the lamppost. Challis still lives in Cambridgeshire and is also responsible for the ornate railings found at Grantchester Meadows. The current design with four pendant lamps dates from the 1946 repair. In 1996 the lamppost was designated as a Grade II listed building. In 2016–17 Cambridge City Council restored the lamppost, reinstating its earlier colours of moss green, red, white and gold, and casting any new parts as required. In 2018, anonymous local art installers, Dinky Doors, installed a reality checker "door" on the checkpoint, which was refurbished in 2019. Inscription One report claims that the name was first painted on the lamppost in the early 1970s by students from Cambridgeshire College of Arts and Technology (now Anglia Ruskin University) under the guidance of one of their teachers. Another claims that it was originated in 1970 by the Emmanuel Liberation Front (ELF), one of whose members first scratched the name onto the lamppost. The ELF was a group of radical students at Emmanuel College between 1969 and 1971 influenced by the Situationists with their slogan "Do not adjust your mind. There is a fault in reality." Emmanuel adjoins the northwest side of Parker's Piece. Until the early 1970s, the lamppost was painted a dishwater grey or discoloured cream. In 2017 two brothers, David and Sandy Cairncross, revealed that they had been responsible for repainting it in bright colours in October 1973, a task undertaken with the written permission of Geoffrey Cresswell, the Cambridge City Engineer. At the time, David was a student at King's College, Cambridge and Sandy, a postgraduate research student (now a distinguished epidemiologist). The repainting did not involve anyone from Cambridgeshire College of Arts and Technology. The Cairncrosses confirmed that the name "Reality Checkpoint" had previously been inscribed in marker pen on the pillar "a year or two earlier" and that their painting of the name was initially a placeholder for more sophisticated lettering. On how the lamppost got its name, David acknowledged the influence of Checkpoint Charlie during the Cold War, and the popularity of Carlos Castaneda’s 1971 memoir A Separate Reality. The Cairncrosses' repainting remained throughout the 1970s and into the 1980s. By 1980 however, the lamppost was looking shabby, as was clear in a photograph of the poet Tom Raworth taken next to it in 1980. Eventually Cambridge City Council painted over the decoration with a dull faux