stated: "He [Lambert] was already in advanced stages of whatever. He died when a coke dealer pushed him downstairs." Lambert was cremated and his ashes interred in Brompton Cemetery, London, in the grave of his father, paternal grandfather, and grandmother. By 2018, his original inscription on the family headstone – "Christopher Sebastian 'Kit' Lambert – Son of Constant 1935–1981 Creative Musician" – was virtually unreadable. Nick Salaman, a friend since they were at university, wrote in the Friends of Brompton Cemetery magazine: "He was more than a creative musician. And who was this Christopher Sebastian Lambert? Did anyone know or care about his full name? An idea popped in my mind to put up a new gravestone that spelt out exactly who Kit was and what he was famous for." A new stone, paid for by Salaman, and Kit's only surviving relative, his half-sister Annie, was added to the bottom in place of the original one. Unveiled in a ceremony at midday on 12 June 2018, it is inscribed: "Also Constant's son, Kit Lambert, 1935–1981, The man who made The Who". The Lamberts biography Some material compiled by Lambert and Lindsay was included in a book called The Lamberts by writer and poet Andrew Motion, the British Poet Laureate, which won the Somerset Maugham Award literary prize in 1986. The tapes made by Lindsay of Lambert's interviews were several hours in length and became an important historical reference both of the era of pop and rock music as well as of Lambert's own tumultuous life. On the tapes he dispelled some of the popular rumours that he had purposely perpetuated himself to generate publicity about his charges. However, Lambert's methods in promoting groups like The Who were far more eccentric and stranger than popularly believed. The two remaining members of The Who, Townshend and Roger Daltrey, have always acknowledged Lambert as a major influence on the band's success, along with his business partner Chris Stamp. After his death his estate was worth over £490,000 and the royalties that have flowed in from his various works to his heirs have totaled over £1 million. Popular culture In 2014, an American documentary film was made about Kit Lambert and Chris Stamp entitled Lambert & Stamp. It was produced and directed by James D. Cooper. It had its world premiere at 2014 Sundance Film Festival on 20 January 2014. According to Lapin (2015),