Wal-Mart's reshuffle of top executives at Asda this week sees retail director Paul Mason step up to become chief operating officer. He takes over day-to-day control of Asda from Allan Leighton (see page 60). Tony Campbell broadens his responsibilities working with George Davies on European clothing developments, while Tony Denunzio adds Wal-Mart's European financial operations to his role as Asda's chief financial officer. The changes come in the wake of Leighton's shake-up of Wal-Mart's German operations in April, when Volker Barth was appointed German chief operating officer. {{NEWS }}