Although he was classically trained, studying under the famous French music educator Nadia Boulanger, he has also written for comedy shows such as Spitting Image, for which he composed "I've Never Met a Nice South African."
After graduation he took lessons in composition from Nadia Boulanger, studied electronic music with Lawrence Casserly and Javanese Gamelan with Alec Roth.
Other dance projects includes Finale for Charlie composed for Charles Augins and Endangered Species created for the Kosh Theatre Company.
However, his Don Quixote was composed for the husband and wife team of Reg Bolton and Annie Stainer and the Traverse Theatre.
These include the television shows, Smith and Goody, Not the Nine O'clock News and Alas Smith and Jones, for the last two of which Brewis provided music and lyrics, the films Morons from Outer Space and The Tall Guy and the stage show Not in Front of the Audience in which the cast of Not the Nine'O'clock News performed Brewis's short musical Laker!