THE boss of Northern Foods resigned yesterday in the wake of a profits warning.

Chief executive Jo Stewart, who has worked for the company for 15 years, was leaving amid concern the firm was "not operating to its full potential".

Group pre-tax profits for the first half, excluding one-off costs, are expected to be significantly lower than the comparable period last year, the company said.

This has been blamed on performance in convenience foods reflecting "very challenging" trading conditions, the impact of the hot summer and margin pressures caused by raw material cost inflation.

Northern Foods, which makes Fox's biscuits, is the parent company of Dalepak Foods, of Leeming Bar, North Yorkshire.

Chairman Peter Blackburn is stepping in as executive chairman pending the appointment of a new chief executive.

The group's five largest customers are Marks and Spencer, Tesco, Sainsbury's, Asda and Safeway.