Lone Star Funds is considering an initial public offering of U.K. gas-station operator MRH GB Ltd. that could value the business at about 1.5 billion pounds ($2 billion) amid a revival of stock sales in Europe, people familiar with the matter said. The U.S. private equity firm has picked investment bank Lazard Ltd. as financial adviser for a potential London listing, the people said, asking not to be identified as the information is private. Lone Star is also talking to underwriting banks about mandates, the people said.