It comes after a raft of supermarkets and high street chains already confirmed closure plans for the day.
M&S said it will also halt deliveries to customers on Monday September 19, which will be a bank holiday as the Queen’s state funeral takes place.
Stuart Machin, chief executive at M&S, said: “All of us at M&S – and indeed across the country and beyond – feel a real and deep sense of loss and sadness at the passing of Her Majesty, as well as huge respect for the grace with which His Majesty King Charles III and the wider royal family have led the nation in our mourning.
We’re deeply saddened to hear of the passing of Her Majesty The Queen. She’s led for over 70 years with quiet determination and selfless devotion.
We join the Royal Family and the nation in their grief and offer the Royal Family our heartfelt condolences. pic.twitter.com/kDdFbw5D94
— M&S (@marksandspencer) September 8, 2022
“It is right that we make changes to our operational arrangements on the day of the funeral to ensure our colleagues across our stores and distribution network can participate, whilst supporting customers as they show their respects too.”
He added there will be “limited exceptions in London and Windsor”, where M&S will serve customers paying their respects to the Queen.
These stores will be shut during the funeral itself, the retailer highlighted.
Franchise stores at travel locations and in public service sites, such as hospitals, are expected to remain open on Monday.
Asda said it will shut all its stores until 5pm on the day to allow employees to watch the funeral.
An Asda spokesman said: “As a mark of respect for Her Majesty The Queen, all Asda stores will be closed on Monday September 19 until 5pm to allow our customers and colleagues to recognise the passing of our late monarch and commemorate her steadfast service to our nation.
“We will not be offering online deliveries on Monday September 19.
“All our stores will close by midnight on Sunday September 18 and reopen at 5pm on Monday September 19.
We are deeply saddened by the announcement of the death of Queen Elizabeth II. For more than seven decades Her Majesty has been a constant in our lives. We are profoundly grateful for her extraordinary service to the nation and send our heartfelt condolences to The Royal Family. pic.twitter.com/m0LquEgwiu
— Asda (@asda) September 8, 2022
“Those colleagues contracted to work while the stores are closed will receive their normal pay.
“Any colleagues who work when the stores reopen will be paid double time for the rest of the day.”
It comes a day after Tesco, Sainsbury’s and Aldi all confirmed they would shut their supermarket stores for the day of the funeral, with fashion retailers such as Primark also confirming closure plans.
Retailers are not required to shut their doors on the day of the funeral, and others may choose to open for reduced hours, as many regularly do on other bank holidays.
The Government guidance is: “Some businesses may wish to consider closing or postponing events, especially on the day of the state funeral, however, this is at the discretion of individual businesses.”