SAINSBURY'S has announced a management shake-up at its supermarkets, putting thousands of jobs at risk.

The retailer, which has stores in Bolton town centre, Westhoughton and Bromley Cross, is consulting with staff over plans that will see the number of senior in-store posts slimmed down and replaced with fewer management roles.

Affected staff, thought to run into the thousands, will be given the choice of applying for the new roles, accepting a more junior position or facing redundancy consultation.

Sainsbury's said the changes at both its supermarkets and convenience stores are "designed to meet the challenges of today's retail environment" and will result in more "efficient" structure.

Simon Roberts, the supermarket's retail and operations director of Sainsbury's, insisted that the "intention is not to reduce overall headcount".

He added: "We're proposing a store management structure that will deliver best-in-class leadership and, in many cases, will offer an improved reward package for new management roles.

"The proposals will introduce a more efficient and effective structure, designed to meet the challenges of today's retail environment."