Question: Which company did Sir Charles William Dunstone formerly serve as chairman and also trades under the name Phone House?

Context paragraphs:
Sinopec: China Petroleum & Chemical Corporation (中国石油化工股份有限公司), or Sinopec (), is a Chinese oil and gas company based in Beijing, China.  It is listed in Hong Kong and also trades in Shanghai and New York.

Charles Rouse-Boughton: Sir Charles William Rouse Boughton (December 1747 – 26 February 1821) was an administrator in India with the East India Company and subsequently a member of the British House of Commons representing first Evesham and then Bramber.

Lundin Mining: Lundin Mining is a multinational minerals company with operations in the United States, Sweden, Ireland, Spain, Portugal, the Democratic Republic of Congo, and Russia.  Lundin Mining is headquartered in Toronto, Ontario and trades on the Toronto Stock Exchange as part of the S&P/TSX 60 index.  The company also trades on the Swedish Nordic Exchange with an overall market capitalization of around 1.7 billion CAD as at July 14, 2009.  The company is currently developing the Tenke Fungurume Copper and Cobalt deposit in the Democratic Republic of Congo in which it owns at 24.75% stake (as Tenke Mining Corp.).

SIX Swiss Exchange: SIX Swiss Exchange (formerly SWX Swiss Exchange), based in Zurich, is Switzerland's principal stock exchange (the other being Berne eXchange).  SIX Swiss Exchange also trades other securities such as Swiss government bonds and derivatives such as stock options.

Silver Star Holidays: Silver Star Holidays is a coach operating company based in Caernarfon, Gwynedd, Wales.  Founded in 1918, its primary operation is coach holiday tours.  Local bus services in Gwynedd were run by Silver Star until November 2010, when they were sold to Express Motors.  Silver Star also trades under the Welsh name Seren Arian, with offices is both Caernarfon and Wrexham.  The company entered administration on 6 October 2011 and ceased operation, but resumed services under new management later in the same month.

Jinan Qingqi: Jinan Qingqi Motorcycle Co., Ltd () is a Chinese manufacturer of mopeds, quadbikes and other small engined & electric motorcycles that was founded in 1956.  The company headquarters is located in Jinan, Shandong Province.  Qingqi is probably the best known moped brand in modern China and the company is one of the larger manufacturers of small engine motorcycles in the world, but is almost completely unknown outside its domestic market, it is however a large original equipment manufacturer provider to companies such as Cycle Union, Suzuki and Peugeot.  In the case of the latter two companies that has eventually lead to the formation of joint ventures including JQ/Suzuki venture called Plum Qingqi Motors company that is based in Pakistan and also trades using the Qingqi trademark.

Charles Dunstone: Sir Charles William Dunstone, CVO (born 21 November 1964) is the co-founder and former chairman of mobile phone retailer Carphone Warehouse, former chairman of multinational electrical and telecommunications retailer and services company Dixons Carphone (formed on 7 August 2014 by the merger of Dixons Retail and Carphone Warehouse), and executive chairman of the TalkTalk Group.

Charles Allom: Sir Charles Carrick Allom (1865–1947), grandson of architect Thomas Allom and painter Thomas Carrick, was an eminent English decorator, trained as an architect and knighted for his work on Buckingham Palace.  Among his American clients in the years preceding World War I was Henry Clay Frick, for whom Allom furnished houses in cooperation with Sir Joseph Duveen, the eminent paintings dealer.  Allom furnished the Henry Clay Frick House at 71st Street and Fifth Avenue that today houses the Frick Collection, and the neo-Georgian house, "Clayton", in Roslyn, Long Island, designed by Ogden Codman, Jr., that was bought for Frick's daughter-in-law.  For the grand rooms of parade in Frick's New York house, Sir Charles, whose London workshops produced the plasterwork and "boiseries", kept the furnishings muted, not to compete with Frick's collection of paintings.  In 1925, when William Randolph Hearst purchased a real castle, St. Donat's in Wales, his choice to furnish it naturally fell upon Sir Charles.

Charles Willink: Sir Charles William Willink, 2nd Baronet (10 September 1929 – 10 March 2009) was an English classical scholar, teacher and baronet.  He succeeded his father Sir Henry Willink to the Willink Baronetcy on his death in 1973, and was himself succeeded on his death by his son Sir Edward Daniel Willink.

Carphone Warehouse: Carphone Warehouse is a British mobile phone retailer, with over 2,400 stores across Europe.  It trades as Carphone Warehouse in the United Kingdom and Ireland, and as Phone House elsewhere.

Supporting paragraphs: Charles Dunstone Carphone Warehouse
Answer: Carphone Warehouse