The Newsroom and Mary Poppins Returns star is in the early stages of development with the remake, which will be produced by her own indie King Bee and eOne.
The series, which ran on ITV predecessor Thames Television between 1978 and 1992, starred Leo McKern as Horace Rumpole, an elderly barrister in London who defended a weird and wonderful mix of clients. It started as a radio play on the BBC before making the move to television.
The reboot was revealed at a Deadline-moderated Banff Connect event in London by Polly Williams, eOne’s head of scripted development in the UK. The Designated Survivor studio has a first-look deal with Mortimer’s company, which she runs with her husband Alessandro Nivola.
Williams told Deadline that Mortimer has “reimagined” the series