Marriott's most noted role was as Gavin Featherly in the BBC leisure centre sitcom The Brittas Empire.
As a constituent part of Guy Masterson's "Lest We Forget" tour,[citation needed] it played at The Bakehouse Theatre in Adelaide, South Australia.
[citation needed] In late 2019 Marriott co-wrote (with Sherlock Holmes specialist Bert Coules) a new one-man play, Watson: The Final Problem.
An initial audio version was made during the first Covid lockdown, followed by a single tryout performance at the Grove Theatre Eastbourne.
He top-edged a ball into his face while playing with his 15-year-old son at the Nevill Ground during Bluemantles Cricket week.