Question: The person who presented Mary Queen of Shops television series was appointed by who to lead a review into the future of Britain's high streets?

Context paragraphs:
Coalescent: Coalescent is a science-fiction novel by Stephen Baxter.  It is part one of the "Destiny's Children" series.  The story is set in two main time periods: modern Britain, when George Poole finds that he has a previously unknown sister and follows a trail to a mysterious and ancient organisation in Rome (Puissant Order of Holy Mary Queen of Virgins); and the time of Regina, a girl growing up during the ending of Roman rule in Britain, around AD 400.

Richardson Block: The Richardson Block is an historic block of commercial buildings at 113-151 Pearl and 109-119 High Streets in Boston, Massachusetts.  It consists of a series of buildings constructed in the aftermath of the Great Boston Fire of 1872.  The first of these buildings, at the corner of Pearl and High Streets, was designed by William Preston and built in 1873 for Jeffrey Richardson, using granite and brick salvaged from buildings that had previously stood on the site.  The area was an important locus of the leather goods business both before and after the fire, and the buildings constructed after the fire are among the only neo-Greek commercial structures standing in Boston's Financial District.

Sea Dog Table: The Sea Dog Table is one of the treasures of Hardwick Hall like the Eglantine Table.  It is a very elaborately carved table of around 1600.  It has acquired some interesting historical anecdotes concerning the Cavendish family.  There are doubtful stories that it may have been a possession of Queen Elizabeth I or Mary Queen of Scots, but it may well have been made after both of these were dead.  It is regarded as one of the most important examples of 16th century furniture in Britain.

Gamleys: Gamleys was a chain of toy shops mainly located in the south of the United Kingdom with a head office in Hove, near Brighton.  The company was founded in 1919.  Unlike many of its rivals such as Toys "R" Us, Gamleys operated smaller shops in high streets and shopping centres rather than larger super stores.  Because of this different approach to business it had managed to survive, unlike the former Children's World.  The name Gamleys was thought up by the original proprietor, Bill Lord who wanted to mix the names of the two most famous London stores, Gamages and Hamleys.

Mary Portas: Mary Portas (née Newton; born 28 May 1960) is an English retail consultant and broadcaster, known for her retail- and business-related television shows, founding her creative agency Portas and her appointment by David Cameron, the British Prime Minister, to lead a review into the future of Britain's high streets.

King William Street, Adelaide: King William Street is the part of a major arterial road that traverses the CBD and centre of Adelaide (the capital of South Australia).  It was named by the Street Naming Committee on 23 May 1837 after King William IV, the then reigning monarch, who died within a month.  King William Street is approximately 40 m wide, and is the widest main street of all the Australian State capital cities, which are significantly narrower by comparison.  It is historically considered one of Adelaide's high streets, for its focal point of businesses, shops and other prominent establishments.

Mary Queen of Shops: Mary Queen of Shops is a British television series presented by Mary Portas broadcast on BBC Two.  The series began with a four-week run starting on 7 June 2007, and returned for a second series of six episodes beginning on 9 June 2008.  A third three-part series, titled "Mary Queen of Charity Shops", began on 2 June 2009.  The show returned for a fourth series on 7 June 2010, featuring various independent shops, rather than just fashion boutiques.  The title of the programme is a play on Mary, Queen of Scots' name.

Jamaica Blue: Jamaica Blue is a franchise business of Foodco which operates small coffee shops throughout the Australia, New Zealand, UK, China, Malaysia, Singapore and United Arab Emirates.  The company mainly operates businesses in residential areas, malls, airports, hospitals and high streets.  In 2012, Jamaica Blue celebrated its 20th year anniversary.  Jamaica Blue has around 134 cafés internationally in 7 different countries.  It has opened its 100th store in Australia on the 16th October 2014 with the 100th café opened in the new development of Westfield Miranda.  Jamaica Blue is the sister company of Muffin Break, which is also a franchise of Foodco.

Marich Buildings, Fremantle: The Marich Buildings is a single two storey building located at the corner of Henry and High Streets in Fremantle, Western Australia, and dates from c1897; there were several single story shops on the site including one occupied by butchers Henry Albert & Co.

Chicken and chips: Chicken and chips is a combination of foods predominantly consumed in the United Kingdom, The Commonwealth, and United States.  It consists of a piece of fried, roasted, or barbecued chicken and French fries, or chips as they are known in the UK.  The consumption of chicken and chips is a popular food choice based on its value for money.  In some cities, such as London, on most high streets there are at least one or two chicken and chip shops, amongst kebab, pizza, Chinese, and Indian take-away shops.

Supporting paragraphs: Mary Queen of Shops Mary Portas
Answer: David Cameron