Macdonald admits he was keen to be a part of his own project, but the day coincided with a trip to visit his mother-in-law, who had suffered a stroke, and he didn't want to capture his family's trauma on film.

He tells Britain's Sunday Express, "On the day, I was thinking to myself I should be filming this, because this is the kind of thing I want, but I wasn't brave enough. I didn't want to put my family through it.

"That made me have even more respect for the people who did film deeply personal things and were brave enough to share them."