Question: A major British multinational retailer headquartered in the City of Westminster, London, that's also known as M&S?

Context paragraphs:
Timpson (retailer): Timpson is a British multinational retailer specialising in shoe repairs, key cutting and engraving, as well as dry cleaning & photo processing.  The company also offers mobile phone repairs, jewellery and watch repair, custom-made house signs.  It is based in Wythenshawe, Manchester, and currently has over 1325 outlets in the United Kingdom and Ireland.  In January 2014, Timpson purchased the photographic services franchise, Snappy Snaps, increasing its store count by 118.

Ann Summers: Ann Summers is a British multinational retailer company specialising in sex toys and lingerie, with over 140 high street stores in the UK, Ireland, and the Channel Islands.  In 2000, Ann Summers acquired the Knickerbox brand, a label with an emphasis on more comfortable and feminine underwear, while the Ann Summers-labelled products tend to be more erotic in style.  The chain had an annual turnover of £117.3 million in 2007-2008.

Carrefour: Carrefour S.A. (] ) is a French multinational retailer headquartered in Boulogne Billancourt, France, in the Hauts-de-Seine Department near Paris.  It is one of the largest hypermarket chains in the world (with 1,462 hypermarkets at the end of 2016).  Carrefour operates in more than 30 countries, in Europe, the Americas, Asia and Africa.  Carrefour means "crossroads" and "public square" in French.  The company is a component of the Euro Stoxx 50 stock market index.

Broadwalk Centre: The Broadwalk Centre is a shopping centre located in Edgware, London, and is owned by Scottish Widows Investment Partnership (SWIP), having been purchased from The Carlyle Group and Bride Hall Holdings for £70 million in March 2012.  The Broadwalk Centre is a single-storey shopping centre and holds over 20 shops including Sainsbury's, M&S, Boots, WHSmith, Costa Coffee, and Superdrug, as well as disabled and public toilets and baby changing facilities.

Tesco: Tesco PLC is a British multinational grocery and general merchandise retailer with headquarters in Welwyn Garden City, Hertfordshire, England, United Kingdom.  It is the third largest retailer in the world measured by profits and ninth-largest retailer in the world measured by revenues.  It has stores in 12 countries across Asia and Europe and is the grocery market leader in the UK (where it has a market share of around 28.4%), Ireland, Hungary and Thailand.

David Slade (businessman): David Slade is the Australian Director of British multinational retailer Topshop and co-owner of A-League club Western Sydney Wanderers.

Next plc: Next (), styled as next, is a British multinational clothing, footwear and home products retailer headquartered in Enderby, Leicestershire.  It has around 700 stores, of which 500 are in the United Kingdom and Ireland, and around 200 are in continental Europe, Asia and the Middle East.  Next is the largest clothing retailer by sales in the United Kingdom, having overtaken Marks & Spencer in early 2012 and 2014.  It is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index.

Debenhams: Debenhams plc is a British multinational retailer operating under a department store format in the United Kingdom and Ireland with franchise stores in other countries.  The company was founded in the eighteenth century as a single store in London and has now grown to 178 locations across the UK, Ireland and Denmark.  It sells a range of clothing, household items and furniture and has been known since 1993 for its 'Designers at Debenhams' brand range.

Marks &amp; Spencer: Marks and Spencer plc (also known as M&S) is a major British multinational retailer headquartered in the City of Westminster, London.  It is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index.

Thomas's London Day Schools: Thomas's London Day Schools (also known as Thomas's Preparatory Schools or simply Thomas's) are four private preparatory schools in London, UK.  They are located in Kensington, Battersea, Clapham and Fulham, as well as a kindergarten in Battersea.  They are a family-run establishment, and have come to be seen as a feeder for major British public schools such as Harrow, Eton, Marlborough, City of London, Radley, King's College School, and Westminster.

Supporting paragraphs: Broadwalk Centre Marks &amp; Spencer
Answer: Marks and Spencer plc