He said: “I still don’t know how I did it, but I trotted out, twisted something in my leg, and snapped my Achilles tendon.
“It was excruciating, but I was so aware that the scene had to be ‘in the can’ to finish shooting, that I went on for a short while with it strapped up simply.
“And then they had to devise a way of getting me on screen, fairly static, and from the waist up.
“The result is that, in order for it all to heal, I’ve been in a leg cast for about four months.”
He added to The Yorkshire Post: “You just have to grin – and limp on with it.”