The actor, best known for his role as Mark Latimer in the hugely popular ITV series, married Downton Abbey star Nuttall in 2012, with the couple welcoming their only child in 2015.
After Downton Abbey star Amy s husband Andrew walked out on her it was the latest blow to befell the 40-year-old actress, who has had a rocky romantic past with her romances.
The Broadchurch star, 44, is said to have left the family home over Christmas and moved in with Leila Farzad, 40, after meeting the glamorous actress on series Better.
Broadchurch star Mr Buchan, 44, is said to have left the family home over Christmas and moved in with Leila Farzad, 40, after meeting the actress while working on the BBC series Better.
There is an intense on-screen chemistry between Broadchurch actor Andrew Buchan and co-star Leila Farzad in the BBC drama Better, a body language expert has said.