Trained at RADA, where he is now an Associate, Gareth Thomas has worked extensively in television, theatre, film and radio.

Following guest appearances in The Avengers and Public Eye, his first major television role came in 1972 as the Welsh policeman sent to police the 1913 Cornish clay miners' strike in Stocker's Copper.

It earned Gareth his first BAFTA nomination and led to roles in the legal drama Sutherland's Law, and adaptations of David Copperfield and How Green Was My Valley.

After playing Lord Beresford in Edward VII and astro-physicist, Adam Brake, in the mystery serial Children of the Stones, he starred as resistance leader Roj Blake in Terry Nation's Blake's 7.

Although he would return for the season three episode Terminal and the final show, Blake, Gareth left the series after two years to play James Tayper Pace in The Bell and Dr. Philip Denny in the period medical drama The Citadel.

He earned a second BAFTA nomination portraying the Welsh hill farmer in Morgan's Boy. After appearing as one of Cromwell's soldiers in By the Sword Divided, he played another futuristic rebel leader in Knights of God.

In the 1990s Gareth played a drunken bigot in We Are Seven, the fire brigade area commander in London's Burning, and Nathaniel Clegghorn in Heartbeat, followed by guest roles in The Strangerers, Randall and Hopkirk (Deceased) and the comedy Baddiel's Syndrome. More recently he appeared as Blaze in Merlin - The Legend, and Reverend Denis Thomas in the docu-drama Shipman.

His stage performances have been just as prolific with roles in everything from Shakespeare to Chekov. Recently he played Big Daddy in Cat on a Hot Tin Roof, publican Michael James Flaherty in The Playboy of the Western World, and the Holocaust refugee in Moving Objects.

Featured on several CDS, Gareth plays Kalendorf in Big Finish Audio's Dalek Empire series, and the villainous megalomaniac Arran Arkenstein in the comedy science-fiction audio series Soldiers of Love from MJTV.