Before starting his signwriting business John Corah spent a period of time in the 1970s driving for Brian Harris Transport, the history of which he wrote about in From Moorlands to Highlands, which is also published by Old Pond and now in its 3rd edition. He is now a semi-retired signwriter and article writer. He is also very much involved in the preservation of classic lorries and owns three of them himself, giving him considerable empathy towards his job of signwriting restored classic lorries for their owners.