The Barry Award is a crime literary prize awarded annually since 1997 by the editors of Deadly Pleasures, an American quarterly publication for crime fiction readers. From 2007-2009 the award was jointly presented with the publication Mystery News. The prize is named after Barry Gardner, an American critic.
Note that the "best British crime novel" in this context is best crime fiction novel first published in English in the United Kingdom and does not reflect the author's nationality.