Conversation so far:
When did Rob have a writing breakthrough?
In 2000 he made his mark in television comedy, with two series which he co-wrote and performed for the BBC.
Was he successful?
Since these series Brydon has developed a career path as a character actor, in both comedic and serious roles.
what other writing did he do?
Brydon's book Small Man in a Book (the title a play on his "small-man-in-a-box" impression) was published in November 2011.
What happened after it was published?
CANNOTANSWER.
Anything else interesting?
Since these series Brydon has developed a career path as a character actor, in both comedic and serious roles.

Question: what did he act in?
Self-contained rewrite: what did Rob Brydon perform in as an actor?