The BBC now have a press pack available for Mutual Friends confirming the date and time. You can view the press pack here.

Also the episode guide for Episode 1 is on the BBC website. Beware of spoilers.

If you continue, you will also see production notes. The following was said of Keeley Hawes by producer Rob Bullock:

The character of Martin's wife Jen, played by Keeley Hawes, is pivotal to the story.

Rob says: "Keeley is fantastic, an amazing actress with great charisma.

"Jen is a woman who is, on one level, incredibly selfish; she's had an affair with her husband's best friend, but she blames Martin for all of it; if he hadn't made her unhappy, she wouldn't have done it.

"Keeley can pull it off – be real but be funny at the same time, which is just what you need.

"She's so brilliant because she plays the part very sympathetically and it's rare to find someone like that.