Tullow Oil's founder Heavey will step down as chief executive this month, having been in the post since 1985. The former Aer Lingus accountant has seen his fortune hit by the tumbling price of oil. Heavey, who has a Lamborghini jeep, is now based in Surrey. He also has homes in Wentworth Estate, Dublin and the Caribbean. At one stage, his Tullow stake was worth more than 100m before shares tumbled.