Timothy John Pearson 'Tim' Renwick (born 7 August 1949 in Cambridge, Cambridgeshire, England) is an English guitarist.Renwick is credited as the co-composer with Sir Elton John of Elton John's recorded song, "Dreamboat". The song was released on the "I'm Still Standing" single, but was most likely recorded in the late 1970s.In 1984, Renwick toured with Roger Waters during his The Pros and Cons of Hitchhiking tour. In 1987, David Gilmour invited Renwick to tour with Pink Floyd as a session musician, and recordings from the August 1988 shows were released in the double live album Delicate Sound of Thunder. This makes Renwick, along with Michael Kamen, Patrick Leonard and Jon Carin, one of the few musicians who performed with both Waters and his former bandmates after Pink Floyd disbanded.