I was lucky enough myself to have been in Dad's Army for an episode.

It couldn't sound like a dog, because K9 isn't a dog, but I made it sound as mechanical as possible.

No, I'm at full height, I'm in the studio, I can actually catch actors by the eye, it's fantastic.

Got through it without fluffing, that's the main thing any actor can hope for.

But here I am today recording this and I'm in the studio with all the others on a clean mic. It's extraordinary, the actor's found a way of doing it for himself.

I was lucky enough myself to have been in Dad's Army for an episode.

Martin Jarvis was to have played the part originally but I think I had longer hair or something, I know not.