After graduating from drama school, he was invited by George Devine to join the English Stage Company at the Royal Court Theatre in London, taking part in an actors’ workshop to study Sandford Meisner's improvisation technique under Anthony Page.
He was often heard in leading roles on BBC radio drama and appeared in several movies, starring in two: ‘Some People’ with Kenneth More and David Hemmings and A Place to Go with Mike Sarne, Rita Tushingham and Bernard Lee.
His last starring television appearance was as Honore de St Just, in Danton, with Anthony Hopkins, directed by Stuart Burge for the BBC.
Andrews worked with many distinguished directors and actors of his time, and several of his personal friends in the profession became knights and dames of the realm.
That led to an offer by John McGrath to write the screenplay and direct a 35mm film for BBC 2 based on a novella by Michael Hastings.
In 1972 David Andrews joined the Central Office of Information where he directed documentaries for the Police, Prison and Fire Services.
Leaving STV in 1990 Andrews returned to freelance work directing the drama series Jupiter Moon (BSB), Families (Granada) and Grange Hill, EastEnders, River City and Strathblair (BBC).