Founded as a coal merchant almost a century ago, this West Yorkshire firm’s diverse interests have switched to fuel management and oil distribution, with operations including Be Fuelcards and OilFast. It also owns the 13,000-acre Laudale Estate near Fort William, to which visitors can fly in the UK’s only commercially available seaplane. The business is led by chief executive Jonathan Turner, 51, who also has a 41% stake in The Right Fuelcard Company (No 204 on this year’s table).