Here are the mystery authors whose last names begin with C & D who I have on this site. They write books that take place in Great Britain:
Susanna Calkins: Lucy Campion Mystery Series… Lucy is a chambermaid in 17th century London.
Dorothy Cannell: Her Ellie Haskel series includes Hyacinth and Primrose Tramwell, sisters who own the Flowers Detections Agency.
John Dickson Carr (aka Carter Dickson): Several British series to choose from…
Amanda Carmack: The Elizabethan Mystery series, set in Elizabethan England…
Heron Carvic: The originator of the Miss Emily Seeton cozy series.
Sarah Caudwell: Wrote the Hilary Tamar series.
Henry Cecil (aka Henry Cecil Leon): A British judge who wrote many novels…
Mary Challis (aka Sara Woods, Margaret Leek, & Anne Burton): Jeremy Locke is a barrister.
Cassandra Chan: Phillip Bethancourt & Jack Gibbons Mystery Series
Hampton Charles: The second author to pen the Miss Emily Seeton cozy series…
Kate Charles: Both of her series involve religious/church settings.
Marion Chesney (aka M. C. Beaton): While writing as Chesney, her books tend to include more of a romantic spin.
P. F. Chisholm: Her Sir Robert Carey mystery series takes place during the reign of Elizabeth I.
Agatha Christie: Miss Marple, Hercule Poirot, Tommy and Tuppence…
Anna Clarke: Her series involves two London professors.
Ann Cleeves: Several British series to pick from… one about a birdwatcher…
Barbara Cleverly : Inspector Redfyre Mystery Series – features a Cambridge Criminal Investigation Department detective during the 1920s.
V. C. Clinton-Baddeley: Cambridge Crime Mystery Series featuring a retired professor…
Vivian Conroy: Merula and Raven Mystery Series – Merula is a zoologist in Victorian London.
Vivian Conroy: Lady Alkmene Callender Mystery Series – She’s a British aristocrat in London during the 1920s.
Vivian Conroy: Cornish Castle Mystery Series – Guinevere works in a castle in Cornwall.
Lesley Cookman: Libby Sarjeant Mystery Series with an actress as its sleuth…
Natasha Cooper: Her series feature a romance novelist, a housekeeper, and a barrister.
Hamilton Crane (aka Sarah J. Mason): The third author of the Miss Emily Seeton series…
Edmund Crispin: His series features an Oxford professor.
Deborah Crombie: Scotland Yard… Pretty British!
Clare Curzon: Her Superintendent Mike Yeadings series is amongst many of her novels to choose from.
Jeanne M. Dams: Her Dorothy Martin series features a retired schoolteacher from the States who moves to England.
Dicey Deere: Her novels take place in Ireland.
Julianna Deering (aka DeAnna Julie Dodson): Her Drew Farthering Mystery Series stars an English gentleman in the 1930s.
Colin Dexter: Who hasn’t heard of the police procedurals that feature the great Inspector Morse from the Oxford Homicide Division?
Arthur Conan Doyle: Sherlock Holmes series, starring perhaps the most famous private detective of all fiction.
Sarah Dunant: She has her Hannah Wolfe series and also several stand-alone novels to pick from.
Elizabeth J. Duncan: Her Penny Brannigan is a Canadian in North Wales.
Carola Dunn: 1920s Daisy Dalrymple is a journalist in England.
Other British lists:
Authors beginning with E, F, G, & H
Authors beginning with I, J, K, L, M, & N
Authors beginning with P, R, & S
Authors beginning with T , U, & W
***To access more Cozy Mysteries by Theme click on this link.***
Here is the beginning of the British (Cozy) Mysteries that I have on the site… Not all of the authors are actually British, but the novels take place in Great Britain.