His credits also include the BBC One serial Charles II: The Power and the Passion (as Thomas Osborne, Earl of Danby), directed by Joe Wright.

[citation needed] Dingwall was a regular in ITV's series of police thriller serials, Touching Evil, from 1997 to 1999.

He received acclaim for his performance in the 2019 BBC drama Responsible Child, with The Guardian writing that he "perfectly captures the bitter toxicity of a certain kind of man".

Dingwall's film career began with a small role in Second Best playing the same character as William Hurt.

The film was directed by Academy Award winner Chris Menges and also stars John Hurt.

He appeared in The Man Who Had All the Luck at the Donmar Warehouse as Gus, the enigmatic Austrian mechanic in search of the American dream.

Other appearances have included Joey in Incomplete and Random Acts of Kindness at the Royal Court and Achilles in Troilus and Cressida at the Old Vic.

In 2004, Dingwall fulfilled a lifelong ambition by playing Hotspur in Henry IV, Part 1 at the Bristol Old Vic.