MPs will petition Marks & Spencer over the planned changes to pay that could leave thousands of workers worse off.

The retail giant wants to “simplify” its premium rates for night shifts, Sundays and bank holidays as part of wider changes to its pay rates.

The petition claims 11,000 workers will be left worse off by the changes. M&S has hit back at these suggestions and said it does not recognise this figure, and that 90% of its workers will be better off.

Campaigner Siobhain McDonagh MP will deliver a petition signed by almost 70,000 people to the company’s Paddington HQ on Thursday 1 September.

The petition opposing the plan was started by an employee named Kate Simpson, who feels that she would be worse off under the plans.

Simpson said: “They are targeting staff who have been here the longest, who may have no other option. I’m calling on Marks and Spencer to think again and scrap these proposals that are targeting their most loyal staff.”

M&S director of retail, Sacha Berendji, has said the retailer will listen to all feedback during the consultation.

Earlier this month, Marks and Spencer revealed its Christmas bakery offering.