Howman appeared in many TV shows and films throughout his career. He is an established British comedy actor. Howman took over the role of Jakey Smith from
Robert Lindsay in
Get Some In! in its final series in 1978. He then appeared in the episode "Shadow" in the BBC series ''
Blake's 7, in the Minder episode "All About Scoring, Innit?" playing Danny Varrow, and in The Sweeney'' episode "May," playing Davey Holmes. In 1980, he appeared in
Babylon (1980 film), a 1980 British
drama film directed by
Franco Rosso. Written by
Franco Rosso and
Martin Stellman, it is an incendiary portrait of racial tension and
police brutality set in
Brixton, London. On 25 September 2014, it was announced that Howman had been cast in long-running BBC soap
EastEnders. Howman appeared as the character
Buster Briggs. In his time on the show, Buster's storylines included his relationship with
Shirley Carter (
Linda Henry), his relationship with his two sons
Mick Carter (
Danny Dyer) and
Dean Wicks (
Matt Di Angelo), running a fish stall and having an affair with
Kathy Sullivan (
Gillian Taylforth). In July 2016, it was announced that Howman would be leaving the show after nearly two years. Buster left the show after his relationship with Shirley and his affair with Kathy both ended, with Howman's last episode airing on 23 September 2016. On the radio he also appeared in
King Street Junior as Mr Philip Sims and in
Coming Alive as Terry King. ==Writing projects==