Conversation so far:
What was going on after 1980?
Frost was one of the "Famous Five" who launched TV-am.
What was TV-am?
the station began with an unsustainable "highbrow" approach.
Frost remained a presenter after restructuring.
Who else was a famous five member?
Richard Branson and other interests.
Were there other shows?
his Sunday morning interview programme Breakfast.

Question: How did it do?
Self-contained rewrite: How did after 1980 do?