Mark is an artist and all-round creative person. Here, he talks about discovering his "party trick"; carrying a pencil and paper; the great influence of telly and comics; how a playground phrase became a piece of work exhibited in the Royal Academy; a sneaky debut ad, immediately landing awards and winding up at BBH; Claire the Clairvoyant; working on Christmas Day; and rug tufting.

Believe me. You do not want to miss this.