The third series

had hoped to take some time out after filming the second series, but her new movie, due for release on October 27, stopped all that.

Breathe is about Robin Cavendish, who contracted polio at the age of 28 and was only given a short time to live, but went on to become a pioneering disability advocate.

Andrew Garfield, 34, plays Robin and Claire is his wife Diane.

Claire said: “This job came along at a time when I thought I was going to have a rest, but I didn’t.”

Claire, who is married to actor Stephen Campbell Moore, 39, found the role of Diana Cavendish impossible to turn down.

She said: “I’ve never read a script or anything that affected me quite like that. By the end I couldn’t see because I was crying so much.

“I thought I’d just be mad not to do it.”