Question: In which English city does the company that owns The Classic Malts of Scotland have its headquarters?

Context paragraphs:
The Edrington Group: Edrington, formerly known as The Edrington Group, is a privately owned international spirits company, based in Scotland.  It produces Scotch whisky blended malts, including The Famous Grouse and Cutty Sark, and single malts The Macallan and Highland Park.  The spirits portfolio also includes Brugal, the leading golden rum in the Caribbean and Snow Leopard vodka.

Talisker distillery: Talisker distillery is an Island single malt Scotch whisky distillery based in Carbost, Scotland on the Isle of Skye.  The distillery is operated by Diageo, and is marketed as part of their "Classic Malts" series.  The brand is sold as a premium whisky.

Amex House: Amex House, popularly nicknamed The Wedding Cake, is the former European headquarters of American Express, the multinational financial services company.  It is located in the Carlton Hill area of Brighton, part of the English city of Brighton and Hove.  The nine-floor building, designed by British architecture firm Gollins, Melvin, Ward & Partners, was commissioned by the company in 1977 to consolidate their operations in Brighton, which had been spread over several sites.  The white and blue structure, a landmark on the city skyline, has received both praise and criticism for its distinctive style.  Demolition work began in April 2016 after the completion of a new headquarters building on spare land on the site.

Diageo: Diageo plc ( or ) is a British multinational alcoholic beverages company, with its headquarters in London, England.  It was the world's largest distiller until being overtaken by China's Kweichow Moutai on 9 April 2017.  It is also a major producer of beer.

Douglas Laing &amp; Co: Established in 1948, Douglas Laing & Co is an independent bottler of Scotch whisky.  Based in Glasgow, Scotland, the company has a number of brands including its "Remarkable Regional Malts" range, encompassing The Epicurean, Timorous Beastie, Scallywag, Rock Oyster and Big Peat, as well as Old Particular, Provenance and Xtra Old Particular, which they collectively call their "Exceptional Single Casks".  The firm also creates and sells King of Scots Blended Scotch Whisky, Clan Denny Single Casks and Premier Barrel.

Passport Scotch: Passport Scotch, also called Passport Blended Scotch Whisky, is a brand of whisky exported from Scotland by Seagram Distillers, PLC, and currently owned by Pernod Ricard.  According to "Classic Blended Scotch" by Jim Murray, Passport is a blend of more flavored highland malts with lighter and sweet lowland whiskies, made at Seagram's Speyside distilleries.  The particular blend used in Passport Scotch was first produced in the 1960s by master blender Jimmy Lang, of Seagram’s Scottish subsidiary Chivas Brothers, and started being sold in 1965.  The blend recipe for Passport was developed by Chivas Brothers’ blender Jimmy Lang during the 1960s.  It sold 1.7 million bottles in 2015, being a strong performer in Brazil (where it is second on the Scotch whisky market), Angola, Mexico, Spain, Portugal and Poland.

Tomintoul distillery: The Tomintoul-Glenlivet Distillery is a distillery in Ballindalloch, in the Speyside region of Scotland, producing malt whisky for blends and bottled as single malts.  The distillery was founded in 1964.  It doubled in capacity when two extra stills were installed in 1974, and started bottling single malt whisky in that year.  It produces a range of single malts of different ages, a peated malt, and a vintage malt.  The distillery is owned and operated by Angus Dundee Distillers, PLC, of London, England, which also owns and operates the Glencadam distillery.

United Distillers: United Distillers was a Scottish company formed in 1987 from combining the businesses of Distillers Company and Arthur Bell & Sons, both owned by Guinness.  The company owned six single malt Scotch brands, which were relaunched as the "Classic Malts" range.  It also owned the Bernheim distillery (now owned by Heaven Hill) and the Stitzel-Weller distillery, both in Louisville, Kentucky in the United States.

Classic Malts of Scotland: The Classic Malts of Scotland is a selection of six single malt whiskies, launched and marketed together in 1988 by United Distillers and Vintners which is now owned by Diageo.  They are often displayed together in bars and liquor stores.  Diageo has since marketed other single malt labels and expressions with the Classic Malts labeling.  The six original malts are:

The Old Duke: The Old Duke is a jazz and blues venue and pub situated on King Street in the English city of Bristol.  Live music is played every night of the week, admission is free and it hosts an annual Jazz Festival.  The pub's name is a reference to the classic American jazz musician Duke Ellington, though the pub has actually held the same (or similar) name since it was built, and most likely previously referred to The Duke of Cumberland.

Supporting paragraphs: Classic Malts of Scotland Diageo
Answer: London