“This conditional proposal substantially undervalues William Hill, is highly opportunistic and does not reflect the inherent value of the business,” Chairman Gareth Davis said in the statement. The “highly complicated” proposal involves “substantial risk” for shareholders, as the merged company would be saddled with 2.2 billion pounds of debt to fund the cash part of the deal, it said . . . The offer heaps more pressure on William Hill, which last month ousted Chief Executive Officer James Henderson as it struggles to keep pace in the fast-growing world of online betting. The bookmaker launched a new web platform and mobile application last year, though ran into difficulties that led to a slowdown in betting growth. It cut profit guidance in March.