Whilst working there, the actress Helen Burns (mother of one of his pupils, future actor Chris Langham) inspired Miles to audition for the Birmingham Repertory Company.

In the early 1980s he played a season at the RSC opposite Kenneth Branagh in Henry V, Roger Rees in Hamlet and Antony Sher in Richard III.

[2] Miles had a broad television career and his appearances included guest parts in Sherlock Holmes (1968), Doomwatch (1970), Colditz (1972), Crown Court (1973), Moonbase 3 (1973), The Sweeney (1975), Survivors (1975) and Bergerac (1990).

[5] Miles appeared in the Henry VIII feature film Monarch alongside Doctor Who actors T. P. McKenna and Jean Marsh.

[4] Miles contributed to several other Doctor Who spinoffs, including the independent video production More Than a Messiah[4] and the audio dramas Zygons: Absolution[4] and Prosperity Island,[4] all produced by BBV.

For the licensed audio drama producers Big Finish Productions, he appeared in Whispers of Terror in 1999 and Sarah Jane Smith: Mirror, Signal, Manoeuvre[4] in 2002.

For Magic Bullet Productions, he appeared in five of the Kaldor City SF audio dramas, in the role of scheming politician Landerchild.