The son of a crane driver, Trodd was raised in the Christian fundamentalist Plymouth Brethren. A graduate of Oxford University, following work as a university teacher in West Africa, Trodd began his career in television as an assistant to Roger Smith, script editor of The Wednesday Play in 1964. A problem with the script of Vote, Vote, Vote for Nigel Barton first brought Trodd into contact with Dennis Potter, the play's author. A desire to adapt a short story for an episode of BBC 2's Thirty-Minute Theatre, led to a phone call from its author, Simon Gray, beginning Trodd's association with him and Gray's work in drama.
In 1968, with colleagues Tony Garnett and Ken Loach, he set up Kestrel Productions, a company which was affiliated with London Weekend Television. From now on Trodd worked as a producer, and the short-lived Kestrel saw the beginning of Trodd's professional relationship with Dennis Potter with Moonlight on the Highway (1969) and Lay Down Your Arms (1970), Potter's first play produced in colour. British Sounds (aka, See You at Mao, 1970), a film directed by Jean-Luc Godard, which Trodd produced, had a particularly deleterious effect on Kestrel's relationship with LWT, who banned it.
Trodd returned to the BBC, and worked on Play for Today. On an annual freelance contract, it was not renewed in 1976. The BBC's Personnel Department objected to Trodd's political contacts; he had attended meetings in the early 1970s of the Workers' Revolutionary Party, which atrtracted a small minority in the media, but had never joined the organisation. A letter signed by Trodd's colleagues was sent to Alasdair Milne, Director of Programmes, Television, and Ian Trethowan, Director General of the BBC. The BBC backed down and Trodd was reappointed.
Following the success of Potter's serial Pennies from Heaven (1978), Trodd and Potter reasserted their desire for autonomy and formed a new production company which had an arrangement with LWT. Budgetary problems meant that the connection was again short-lived, and only three Potter-scripted productions were completed, Blade on the Feather, Rain on the Roof and Cream in My Coffee (all 1980). .
Unlike Potter, Trodd was committed to the move to shooting television drama on film, instead of the multi-camera television studio, and oversaw nearly a dozen productions in the BBCs Screen Two strand. At the end of the 1980s, Trodd fell out with Potter over his Blackeyes project, but the two men repaired their professional relationship shortly before Potter's death from pancreatic cancer in 1994.
On 11 December 2011, Trodd attended a screening of Potter's rediscovered Emergency – Ward 9, on which he worked as script editor, at the BFI Southbank in London, introducing the play and answering questions afterwards about its production and his broader working relationship with Potter.
- "Trodd, Kenith", Museum of Broadcast Communications
- Humphrey Carpenter Dennis Potter: A Biography, London: Faber:, 1998 , p.134; Colin MacCabe "An interview with Kenith Trodd", simongray.org, July 2011
- MacCabe "An Interview with Kenith Trodd"
- Mark Hollingsworth and Richard Norton Taylor Blacklist: The Inside Story of Political Vetting, London: Hogarth Press, 1988, p.115-16. The WRP was the Socialist Labour League until 1973, but the source uses the later form.