Question: Sharon Kay Penman and David Edgar both published works in which country?

Context paragraphs:
When Christ and His Saints Slept: When Christ and His Saints Slept is a historical novel written by Sharon Kay Penman, published in 1995.  It is the first of Penman's Plantagenet trilogy, (ultimately five books) followed by "Time and Chance", "Devil's Brood", "Lionheart" and "A King's Ransom".  In the book Penman introduces the genesis of the Plantagenet dynasty as Empress Maude battles to secure her claim to the English throne, ultimately more for her young son Henry Plantagenet, than for herself.  Penman chronicles the story of cousins Maude and Stephen as they fight for England’s throne.

David Edgar (playwright): David Edgar (born 26 February 1948) is a British playwright and writer who has had more than sixty of his plays published and performed on stage, radio and television around the world, making him one of the most prolific dramatists of the post-1960s generation in Great Britain.

Devil's Brood: Devil's Brood is a historical novel written by Sharon Kay Penman, published in 2008, and is the third volume in her Plantagenet series, preceded by "When Christ and His Saints Slept" and "Time and Chance", and followed by "Lionheart" (2011).

The Sunne in Splendour: The Sunne in Splendour is a historical novel written by Sharon Kay Penman.  Penman became interested in the subject of Richard III while a student and wrote a manuscript that was stolen from her car.  She rewrote the manuscript which was published in 1982.

Time and Chance (novel): Time and Chance is a historical novel written by Sharon Kay Penman published in 2002 and is the second volume in the Plantagenet trilogy, preceded by "When Christ and His Saints Slept" and followed by "Devil's Brood."

Sharon Miller: Sharon Kay Miller (born January 31, 1941) is an American professional golfer who played on the LPGA Tour.

Sharon Ritchie: Sharon Kay Ritchie (born January 12, 1937) was Miss America in 1956.

The Reckoning (Penman novel): The Reckoning is a medieval historical novel written by Sharon Kay Penman published in 1991.  The plot is of Wales' Llewelyn ap Gruffydd's fight to keep Wales independent of England and of the love story between the Welsh Prince and Eleanor de Montfort.  In her writing, Penman presents the nobility of the period and focuses on conflict on various levels from individual conflicts to wars between countries.  The novel received generally good reviews.

Here Be Dragons: Here Be Dragons is a historical novel written by Sharon Kay Penman published in 1985.  The novel is the first in a trilogy known as the Welsh Princes series set in medieval England, Wales and France that feature the Plantagenet kings.  Penman is known for providing accurate descriptions of historical events and creating strong characterisations.

Sharon Kay Penman: Sharon Kay Penman (born August 13, 1945) is an American historical novelist, published in the UK as Sharon Penman.  She is best known for the Welsh Princes trilogy and the Plantagenet series.  In addition, she has written four medieval mysteries, the first of which, "The Queen's Man", was a finalist in 1996 for the Best First Mystery Edgar Award.  Her novels and mysteries are set in England, France, and Wales, and are about English and Welsh royalty during the Middle Ages.  "The Sunne in Splendour", her first book, is a stand-alone novel about King Richard III of England and the Wars of the Roses.  When the manuscript was stolen she started again and rewrote the book.

Supporting paragraphs: Sharon Kay Penman David Edgar (playwright)
Answer: Great Britain