Aside from Harrogate there is CRIMEFEST
CRIMEFEST is a convention for people who like to read an occasional crime novel as well as for die-hard fanatics.
Following the hugely successful one-off visit to Bristol in 2006 of the American convention Left Coast Crime, the hosts were encouraged to continue with a similar annual event and created CRIMEFEST.
First organised in June 2008, CRIMEFEST is quickly becoming one of the most popular dates in the crime fiction calendar. The annual convention draws top crime novelists, readers, editors, publishers and reviewers from around the world and gives delegates the opportunity to celebrate the genre in an informal atmosphere.
Are any Crimewave authors going? It's in Bristol 20-23 May 2010