Mornington Crescent appears to have first made its appearance as a game featured in the BBC Radio 4 comedy panel game Im Sorry I Haven't a Clue''. The game, whose rules are never explained, seems to satirize complicated strategy games, particularly the abstruse jargon involved in such games as contract bridge or chess.

A game consisted of each player in turn announcing a landmark or street, most often a tube station on the London Underground system; the winner was the first player to announce "Mornington Crescent", a station on the Northern Line.

The humour of the game was that while its rules were invoked and argued on the show, they were never explained. The game has become quite popular as a social game, and is played regularly by the public both on and off-line.

Mornington Crescent is a street in Camden, London, England was built in the 1820s, on a greenfield site just to the north of central London. It had 36 spacious houses suitable for professional people, surrounded by green fields yet conveniently close to town. It was named after the Earl of Mornington, brother of the Duke of Wellington.

Category: Image - :Mornington Crescent.jpg|thumb|right|Mornington Crescent

However, the building of the railway line into the Euston terminus, and encroachment from the nearby working class districts of Kings Cross and Camden Town led to a change in the pattern of residents throughout the Victorian era. More and more, the houses were subdivided into flats for artists and artisans.

An art deco tobacco factory known as the Carreras Building was built on the crescent's communal garden in the early 20th century. In the late 20th century, the building was restored and converted into an office building and renamed Greater London House.

The crescent has a number of literary and artistic associations. Charles Dickens went to a school there called Wellington House Academy after his spell working in a blacking warehouse, and the painter Walter Sickert lived there. The artist Frank Auerbach has a studio nearby and has often painted the crescent and surrounding area, as did Spencer Gore who lived for a time at number 31.

The Carreras Building, now known as Greater London House is an office building in Mornington Crescent, Camden Town, London, which was constructed as a factory for the Carreras Tobacco Company.

The building was built on the crescent's communal garden in 1926 to designs by M.E. & O.H. Collins and is one of the best known art deco buildings in London. It is 550 feet (168 metres) long, and is mainly white. The exterior was said to be inspired by the Egyptian temple of the cat-goddess Bubastis. When the factory was converted into offices in 1961 the Egyptian detailing - which included a solar disc to the Sun-god Ra, two gigantic cats flanking the entrance and colourful painted details - was lost, but it was restored during a restoration in the late 1990s. Greater London House now houses offices for the Young & Rubicam advertising agency, ASOS.com, EMAP Communications, Radley + Co and other companies. Thomson Holidays UK Head Office used to sit at Greater London House, but following a restructure it re-located to Wigmore House in Luton.

Humphrey Richard Adeane Lyttelton (23 May 1921 ? 25 April 2008), also known as Humph, was an English jazz musician and broadcaster, and chairman of the BBC radio programme Im Sorry I Haven't a Clue''. He was a cousin of the 10th Viscount Cobham and a great-nephew of the politician and sportsman Alfred Lyttelton, who was the first man to represent England at both football and cricket.

David Graeme Garden (born 18 February 1943) is a British actor, writer, presenter, artist and medical doctor. A physician, an actor, television director, and author, he became well-known as a member of The Goodies comedy trio.

Graeme Garden is married to Emma and they have a son, Tom. Graeme has a daughter, Sally, and son, John from a previous marriage."Whos Who on Television" — Independent Television Books, London, England (1985). ISBN 0-907965-31-6"Who's Who on Television''" — Independent Television Books, London, England (1988). ISBN 0-907965-40-0

Barry Charles Cryer OBE (born 23 March 1935 in Leeds, Yorkshire, England) is a British writer and comedian. Cryer has written for many noted performers, including Dave Allen, Stanley Baxter, Jack Benny, Rory Bremner, George Burns, Jasper Carrott, Tommy Cooper, Les Dawson, Dick Emery, Kenny Everett, Bruce Forsyth, David Frost, Bob Hope, Frankie Howerd, Richard Pryor, Mike Yarwood, The Two Ronnies and Morecambe and Wise.[http://www.bbc.co.uk/comedy/clue/interviews/tim_barry_graeme_transcript2.shtml BBC - I'm Sorry I Haven't a Clue - Interviews with the Panellists]

Cryer also wrote episodes for the Doctor in the House television comedy series in Britain.

Timothy Julian Brooke-Taylor (born 17 July 1940) is an English comic actor known in Britain and Australia as a member of The Goodies and in the comedy radio shows Im Sorry I Haven't a Clue, and I'm Sorry, I'll Read That Again''.