In 1957, Campbell married Catherine Kent, That year, he started rearing poultry (with 113 hens) from his wife's farm. At the age of 27, he and his wife moved to Glenrath Farm near
Peebles. It was not an immediate success, and he had to sell part of the farm but his fortunes reversed and in 1970 he acquired another poultry farm. He eventually secured a contract with a Scottish
supermarket, which later merged into
Tesco. By 2010, Glenrath Farms (of which Campbell was chairman) operated on 12,000 acres of land and produced 1.4 million eggs a day; 75% of these are sold to Tesco and 25% to
Asda. == Public service ==