By Laura McGuire Britain’s biggest pub operator Stonegate has raised concerns about its future as it battles a £2.2bn debt pile. The operator of over 4,000 pubs – including the Slug and Lettuce and All Bar One chains – said there is a risk its debt cannot be refinanced by its July 2025 deadline. “There is an indication that a material uncertainty exists that may cast significant doubt on the company and group’s ability to continue as a going concern for the going concern assessment period,” Stonegate said in a recent account filing. It added the hospitality chain “may be unable to realise thei…