Premier Foods, the UK food manufacturer, is mulling the sale of its Ambrosia custard and desserts brand as it continues to look at ways of reducing its debt burden. The company made the announcement as it reported a statutory loss after tax of £700,000 ($910,000) for the first half of its financial year, despite growing revenue by 1.3% and seeing trading profit increase by 6.2%. The Ambrosia brand range includes canned and frozen …