Question: Damien Derek Trotter is a fictional character in the BBC series "Only Fools and Horses", a British television sitcom created and written by who?

Context paragraphs:
Rodney Trotter: Rodney Charlton "Rodders" Trotter is a fictional character in the long running BBC sitcom "Only Fools and Horses", played by Nicholas Lyndhurst.  He was named after Rod Taylor and Charlton Athletic.

Del Boy: Derek Edward Trotter, more commonly known as Del Boy (born 12 July 1945), is the fictional lead character in the popular BBC sitcom "Only Fools and Horses" and one of the main characters of its prequel, "Rock & Chips".  He was played by David Jason in the original series and was portrayed as a teenager by James Buckley in the prequel.  Del is known for his broken French quotes which are usually completely out of context and a variety of catchphrases, including: "He who dares – wins!" , "This time next year we'll be millionaires", "Lovely Jubbly!" , "You know it makes sense" (which he usually says to his customers after they've agreed on a deal) and "You plonker!"  (which he usually says to Rodney).

Cassandra Trotter: Cassandra Louise Trotter (née Parry; born 16 June 1966) is a fictional character from the British sitcom "Only Fools and Horses".  She was portrayed by Gwyneth Strong.

Nicholas Lyndhurst: Nicholas Simon Lyndhurst (born 20 April 1961) is an English actor.  He is known for playing Rodney Trotter in "Only Fools and Horses", Gary Sparrow in "Goodnight Sweetheart", Dan Griffin in the BBC drama "New Tricks" and Adam Parkinson in Carla Lane's series "Butterflies".  Lyndhurst also prominently starred as Ashley Philips in "The Two of Us", as Fletch's son Raymond in "Going Straight", the sequel to the classic British sitcom "Porridge", Jimmy Venables in "After You've Gone", and Freddie 'The Frog' Robdal in the "Only Fools and Horses" prequel "Rock & Chips".

Trigger (Only Fools and Horses): Colin "Trigger" Ball is a fictional character in the popular BBC sitcom "Only Fools and Horses" and its prequel "Rock & Chips".  He was played by Roger Lloyd-Pack in "Only Fools and Horses" and Lewis Osbourne in "Rock & Chips".

Only Fools and Horses: Only Fools and Horses is a British television sitcom created and written by John Sullivan.  Seven series were originally broadcast on BBC One in the United Kingdom from 1981 to 1991, with sixteen sporadic Christmas specials aired until the end of the show in 2003.  Episodes are regularly repeated on UKTV comedy channel Gold, Yesterday and occasionally repeated on BBC One.

Damien Trotter: Damien Derek Trotter is a fictional character in the BBC series "Only Fools and Horses".  He is son to Derek Trotter and Raquel Turner.

Rock &amp; Chips: Rock & Chips is a British television comedy-drama and a prequel to the sitcom "Only Fools and Horses".  Set in 1960s Peckham, it focuses primarily on the lives of Del Trotter, Freddie Robdal and Joan and Reg Trotter.  Nicholas Lyndhurst, who played Rodney in "Only Fools and Horses", plays Robdal alongside James Buckley (Del Boy), Kellie Bright (Joan), Shaun Dingwall (Reg) and Phil Daniels (Grandad).  The Shazam Productions and BBC co-production was written by "Only Fools and Horses" creator John Sullivan, directed by Dewi Humphreys and produced by Gareth Gwenlan.

Uncle Albert: Albert Gladstone Trotter, better known as Uncle Albert, is a fictional character in the BBC sitcom "Only Fools and Horses".  He was introduced during the fourth series as a replacement for the character of Grandad due to the sudden death of actor Lennard Pearce in 1984.  He was portrayed by Buster Merryfield.

Three Men, a Woman and a Baby: "Three Men, a Woman and a Baby" is an episode of the BBC sitcom "Only Fools and Horses".  It was the final episode of series 7, and was first broadcast on 3 February 1991.  This is the last episode of the last regular series, although Christmas specials were broadcast intermittently until 2003.  In this episode, the birth of Del and Raquel's baby is imminent.  Damien Trotter appears in the show for the first time in the episode's finale.

Supporting paragraphs: Damien Trotter Only Fools and Horses
Answer: John Sullivan