Question: Where is the British bicycle manufacturer based who produces the Claud Butler bicycle?

Context articles: Falcon Cycles
Claud Butler
Raleigh Bicycle Company
Ellis Briggs
Phillips Cycles
Calcott Brothers
Paper Bicycle
Giant Bicycles
Waterford Precision Cycles
Litespeed

Falcon Cycles is a British bicycle manufacturer based in Brigg, North Lincolnshire, owned by Tandem Group.
Claud Butler (14 July 1903 – 2 November 1978) was a London-based bicycle dealer and frame-builder, who from 1928 created a chain of bicycle-retail shops in London and the Midlands.
 His company was one of the most successful of the inter-war era but failed after World War II and the resultant boom in motor buses and motor cars.
 The Claud Butler brand was bought from the receivers by other companies, and they are now produced by Falcon Cycles, a division of Tandem Group.
The Raleigh Bicycle Company is a bicycle manufacturer based in Nottingham, England.
 Founded by Woodhead and Angois in 1885, who used Raleigh as their brand name, it is one of the oldest bicycle companies in the world.
 After being acquired by Frank Bowden, it became The Raleigh Cycle Company in December 1888, which was registered as a limited liability company in January 1889.
 By 1913, it was the biggest bicycle manufacturing company in the world.
 From 1921 to 1935, Raleigh also produced motorcycles and three-wheel cars, leading to the formation of the Reliant Company.
 The Raleigh division of bicycles is currently owned by the Dutch corporation Accell.
Ellis Briggs is a British bicycle manufacturer and shop, based in Shipley, West Yorkshire, England.
 It is the oldest bicycle shop in the Bradford area still in business today.
 Ellis Briggs have produced lightweight bicycles since 1936 and continue to do so.
 Ellis Briggs sprang to fame when the cyclist Ken Russell won the 1952 Tour of Britain on an Ellis Briggs.
Phillips Cycles Ltd.
 was a British bicycle manufacturer based in Smethwick near Birmingham, England.
 Its history began early in the 20th century and ended in the 1980s by which time it had become part of Raleigh Industries, itself a part of the Tube Investments group.
 For a number of years, the company was the second-largest bicycle producer in Britain, after Raleigh.
 The company motto, which was carried on all its badges, was "Renowned the World Over".
 The "Phillips" brand is still used around the world, especially in China and the Far East, having been licensed by Raleigh.
Calcott was a small English motor vehicle manufacturer based in Coventry.
 The company began as a bicycle manufacturer in 1886 taking advantage of a boom in the cycling industry at that time.
 The end of the century brought an end to the cycling boom and the demise of many bicycle manufacturers; however, Calcott managed to continue production and by 1904 was also building motorcycles.
 Production switched to automobiles in 1913 of which around 2,500 were made.
Paper Bicycle is a Scottish bicycle manufacturer based in Ayrshire.
 It is also the name of the bicycle that the company produces.
 This is derived from the fact that the original prototype had its chaincase panels covered with wallpaper.
Giant Manufacturing Co. Ltd. (commonly known as Giant) is a Taiwanese bicycle manufacturer that is recognized as the world's largest bicycle manufacturer.
 Giant has manufacturing facilities in Taiwan, the Netherlands, and China.
Waterford Precision Cycles is a small bicycle manufacturer based in Waterford, Wisconsin.
 Waterford produces high-end, custom, hand-built, steel-alloy frame bicycles, particularly road, criterium, stage, track, and cyclocross racing bicycles, that range in price from about $2,500 to $8,500.
 Waterford builds both tig-welded and lugged steel frames to order, and specializes in custom and unique bicycle frames.
Litespeed is a U.S. bicycle manufacturer founded in 1986 in Ooltewah, Tennessee.
 Litespeed makes titanium and carbon fiber frame road racing bicycles and mountain bikes.
 Titanium bicycle frames are famed for their ride quality.
 Litespeed, along with triathlon specific bicycle manufacturer Quintana Roo, is a subsidiary of the American Bicycle Group.