Ashes to Ashes star Philip Glenister is to explore another side of the law – by playing a solicitor in a new BBC drama.

The actor, who bowed out as no-nonsense detective Gene Hunt last year, has been signed up to appear in new BBC1 conspiracy thriller, Undisclosed.

The four-part series will see him teaming up with another well-loved TV detective, actor David Suchet, best known for more than 20 years as Poirot.

Philip plays Harry Venn, a solicitor who takes on a case which leads him to get drawn into the investigation of his brother’s death 20 years earlier.

David will play barrister Sir Nigel Fountain.

The series has been written by Ronan Bennett, who was behind the drama The Hamburg Cell, and who also worked with veteran screenwriter Walter Bernstein.

Philip said: “I am looking forward to shooting Undisclosed, which I feel is a bold, innovative, complex piece of drama from the pen of Ronan Bennett.”

The series – which also stars In Bruges actress Thekla Reuten as lawyer Gina Hawkes – begins filming in Belfast shortly.