Question: Where is the show, in which Frank Thornton is known for playing Captain Peacock, set?

Context paragraphs:
Francis Thornton (Soldier): Lt. Francis Thornton of Rolling Hill (October 22, 1747 – November 18, 1808) was a planter and soldier during the American Revolutionary War.  Thornton served as cornet of Lee's Legion of Light Dragoons commanded by Major-General Henry "Light-Horse Harry" Lee.  Thornton went onto serve as a Lieutenant in the Charlotte County Militia in the later part of the Revolution.  Thornton was the son of William Thornton a Burgess for Brunswick County, Virginia and a great-great-grandson of William Thornton who arrived in Virginia from England as late as 1646 settling in Gloucester County, Virginia.  Thornton was commonly known as "Frank Thornton" as indicated in the historical record and often referred to as "Francis Thornton of Rolling Hill" to differentiate him from his cousins Francis Thornton of Fall Hill and Francis Thornton of Society Hill.  Thornton was a distant cousin of Presidents James Madison and Zachary Taylor.

Are You Being Served? (film): Are You Being Served?  is a 1977 film based on the BBC's hugely successful British sitcom "Are You Being Served? " (1972–1985), which follows the staff of the men's and women's clothing departments of the London Grace Brothers department store.  The story is an adaptation of the successful stage version of the show, which played at Winter Gardens, Blackpool.  The film also featured the performers from the television series, including Mollie Sugden, John Inman, Frank Thornton, Trevor Bannister, Arthur Brough, Wendy Richard, and Nicholas Smith.

Frank Thornton: Frank Thornton Ball (15 January 192116 March 2013) was an English actor.  He was known for playing Captain Peacock in "Are You Being Served? " and its sequel "Grace & Favour" ("Are You Being Served?  Again!")  and as Truly in "Last of the Summer Wine".

Frank Thornton (Savoyard): Frank Thornton (1845 – 18 December 1918) was an English actor, singer, comedian and producer.  Despite a successful stage career in comedies in London, on tour and abroad, Thornton is probably best remembered as the understudy to George Grossmith in a series of Gilbert and Sullivan operas from 1877 to 1884.

Are You Being Served?: Are You Being Served?  (originally styled as "Are You Being Served?"  in quotation marks) is a British sitcom created and written by Jeremy Lloyd and David Croft (Croft also directed some episodes), with contributions from Michael Knowles and John Chapman, for the BBC.  Set in London, the show follows the misadventures and mishaps of the staff of the retail ladies' and gentlemen's clothing departments, in the flagship department store of a fictional chain called Grace Brothers.

Gonks Go Beat: Gonks Go Beat is a 1965 British science fiction / musical fantasy film, directed by Robert Hartford-Davis.  It stars Kenneth Connor and Frank Thornton.  "Gonks Go Beat" is loosely based on the "Romeo and Juliet" storyline and features 16 musical numbers performed by a variety of artists, including Lulu and the Luvvers, The Nashville Teens and members of the Graham Bond Organisation including Ginger Baker, Jack Bruce and Dick Heckstall-Smith.  Other musical contributors were – and remained – obscure.  The film includes an early appearance by the actor Derek Thompson performing with his twin sister Elaine (credited as Elain).

Captain Peacock: Captain Stephen Peacock is a fictional character from the BBC One comedy show, "Are You Being Served? ".  He was played by Frank Thornton, who went on to take the popular role of Truly in "Last of the Summer Wine".

There Goes the Groom: "There Goes The Groom" is a 1997 Christmas special of the BBC sitcom "Last of the Summer Wine" first shown on 28 December 1997.  It was the first to feature Frank Thornton as new third man leader Herbert "Truly of the Yard" Truelove, the episode also marked the final appearance of Foggy.  The Trio in this episode was Compo (Bill Owen), Clegg (Peter Sallis) and Truly (Frank Thornton)

Side by Side (1975 film): Side by Side is a 1975 pop comedy film, directed by Bruce Beresford.  It tells the story of two rival nightclub owners played by Terry-Thomas and Billy Boyle.  The cast also includes Barry Humphries, Stephanie de Sykes, Frank Thornton and many contemporary pop artists such as The Rubettes, Mud and Kenny.

The Blood Donor: "The Blood Donor" is an episode from the comedy series "Hancock", the final BBC series featuring British comedian Tony Hancock.  First transmitted on 23 June 1961, the show was written by Ray Galton and Alan Simpson, and was produced by Duncan Wood.  Supporting Hancock were Patrick Cargill, Hugh Lloyd, Frank Thornton, James Ottaway and June Whitfield.  It remains one of the best known situation comedy episodes ever broadcast in the United Kingdom, though the title is a retronym.

Supporting paragraphs: Frank Thornton Are You Being Served?
Answer: London