Sainsbury's new boss Roberts faces unexpected in-tray

LONDON (Reuters) - When Sainsbury's new boss Simon Roberts hosts a virtual focus group with supermarket shoppers on his first day in charge on Monday, the conversation will be radically different from the one he might have imagined when he got the job.In late January, Britain's second largest supermarket group by sales after Tesco announced retail and operations director Roberts would succeed Mike Coupe as chief executive after his six years in the job.Then the biggest issues Roberts faced..