Question: Where did David Pitblado work with Winston Churchhill?

Context paragraphs:
William LeSassier: William LeSassier (November 6, 1948 – May 13, 2003) was an American herbalist and acupuncturist.  He developed William’s Triune System of Formulation, which continues to be taught by herbalists, including David Winston, who has significantly expanded LeSassier's materia medica.  LeSassier taught and inspired many of the major herbalists currently practicing in the United States, including Matthew Wood, David Winston, Margi Flynt, Kerry Adams and Dina Falconi, and his influence is significant.  His classes were taped and continue to influence herbal medicine in the United States.

David Pitblado: Sir David Bruce Pitblado KCB CVO (18 August 1912–9 July 1997) was a principal private secretary to the office of the Prime Minister of the United Kingdom.  Serving from 1951 to 1956, he was associated with Prime Ministers Clement Attlee, Winston Churchill, and Anthony Eden.  With his colleague Jock Colville, he was one of Churchill's last two principal private secretaries at 10 Downing Street.

Winston Hauschild: Winston Hauschild is a Canadian record producer, songwriter and recording artist.  He has released several albums of his own work and has produced albums for a wide variety of artists, including Hannah Georgas, Bodhi Jones and Wanting Qu, whose album "Everything in the World" has been certified triple platinum in China and Hong Kong.  Winston is a vocal supporter of arts funding and education and sits on the Board of Directors for Music BC, a non-profit industry association dedicated to the growth and sustainability of British Columbia’s music community.

10 Downing Street: 10 Downing Street, colloquially known in the United Kingdom as Number 10, is the headquarters of the Government of the United Kingdom and the official residence and office of the First Lord of the Treasury, a post which, for much of the 18th and 19th centuries and invariably since 1905, has been held by the Prime Minister.

Period Piano Company: The Period Piano Company was established in 1976 by David Winston.  His original training was as a violin maker, having apprenticed to the German violin maker Hans Weisshaar.  This was followed by working for the harpsichord maker William Dowd in Boston for an additional four years, before moving to the UK to work in the Adlam-Burnett workshops.  He has been entrusted with the restoration of antique pianos of great historical importance, including the piano which was made for Beethoven by John Broadwood & Sons in 1817, Chopin's Pleyel from 1846, as well as instruments associated with Mendelssohn, and Liszt.  Beethoven's Piano is part of the Collection of the Hungarian National Museum.  Chopin's Pleyel is in the Cobbe Collection.  Winston, the owner of the company, was granted a royal warrant as a "conservator and restorer of pianos to Her Majesty" in 2012.

Larry Pearson: Larry Pearson (born November 2, 1953, Spartanburg, South Carolina) is a former NASCAR driver and the son of three-time Winston Cup champion David Pearson.  He won the Busch Series championship in 1986 and 1987, but struggled during his brief tenure in Winston Cup.  His last ride in NASCAR came in the Busch Series in 1999, in the No. 00 Pontiac owned by Buckshot Racing.  His Winston Cup statistics include 57 starts and 3 top tens.  His Busch statistics include 259 starts, 15 wins, 78 top fives, 129 top tens, 12 poles, and 6 top ten point finishes (including the two championships).

David Goerlitz: David Goerlitz (born April 15, 1950) is an American actor, writer, educator and a male model.  He is best known as the "Winston Man", appearing in advertising for Winston cigarettes for 8 years in the 1980s.

The First of the Few: The First of the Few (US title Spitfire) is a 1942 British black-and-white biographical film produced and directed by Leslie Howard, who stars as R. J. Mitchell, the designer of the Supermarine Spitfire fighter aircraft.  David Niven co-stars as a Royal Air Force officer and test pilot, a composite character that represents the pilots who flew Mitchell's seaplanes and tested the Spitfire.  The film depicts Mitchell's strong work ethic in designing the Spitfire and his death.  The film's title alludes to Winston Churchill's speech describing Battle of Britain aircrew, subsequently known as the Few: "Never was so much owed by so many to so few".

David Newman (politician): David Gerald Newman, QC (born August 18, 1944) is a lawyer and former politician in Winnipeg, Manitoba.  Since December 1999, after service in public office, he returned to private practice at the law firm Pitblado LLP.  Newman serves as an advocate, negotiator and dispute resolver.  Newman serves as a facilitator of restorative justice processes and as an educator and servant leader in the field of peace, conflict resolution and human rights.

1974 NASCAR Winston Cup Series: The 1974 NASCAR Winston Cup Series was the 26th season of professional stock car racing in the United States and the 3rd modern era NASCAR Cup series.  The season began on Sunday January 20 and ended on Sunday November 24.  The first 15 races were shortened 10 percent due to the 1973 oil crisis.  Following criticism of the 1972 and 1973 points systems that placed emphasis on completed miles, NASCAR implemented a new points system, that took basic purse winnings, multiplied by number of starts, and divided by 1,000; it was designed to more directly reward winning races, a response to Benny Parsons' championship the previous year with just one win.  Richard Petty was Winston Cup champion at the end of the season finishing 567.45 points ahead of Cale Yarborough, while David Pearson finished a strong third in points despite only nineteen starts.  Earl Ross was named NASCAR Rookie of the Year.

Supporting paragraphs: David Pitblado 10 Downing Street
Answer: United Kingdom