Adrian Dunbar will join fellow Northern Ireland star and The Fall actress Bronagh Waugh when he makes his first return to the small screen since Line of Duty for a new ITV detective drama entitled Ridley.

The series, which has already begun filming in the UK, will star Dunbar in the title role as retired detective Alex Ridley, who now works as a consultant and Waugh as DI Carol Farman.

Bronagh Waugh in Unforgotten

The cast also includes Coronation Street's Terence Maynard and Dublin actor Aidan McArdle and will run as four two-hour episodes written by Midsomer Murders’ Julia Gilbert and Happy Valley’s Juliet Charlesworth.

"Filming on the show really couldn’t be off to a better start", said 63-year-old Dunbar

"Despite the wintry weather, everything from cast and crew right down to the catering is excellent. Bronagh Waugh has stepped into her character’s shoes seamlessly and we have been joined by some great actors with more to come."

Co-creator Jonathan Fisher added: "It’s a real thrill for filming to be underway with such a top-rate cast starring alongside Adrian Dunbar and led by a superb production team. We can’t wait to share this absorbing new detective series with our audience."

Producers of the show say Ridley will follow DI Alex Ridley as he joins his former protégé DI Carol Farman on a complicated murder case which takes a dark turn.