Free to enter.
7 days left to this month's Bloomsbury monthy short story comp. http://247tales.wordpress.com/
Writers and Artists yearbook short story comp. (scroll down past the first couple) http://creativewritingink.co.uk/competitions-and-events/
18-25 year olds, decent comp here: http://www.benjaminfranklinhouse.org/site/sections/news/literary_prize.html
Write a bedtime story: http://www.avogel.co.uk/story/
Students.... http://www.newmediawritingprize.co.uk/
Halloween http://www.fivestopstory.com/write/
LibArts competition http://www.libartslondon.co.uk/portfolio/competition/gallery/libarts/
Using "Diamonds" as a theme. http://www.light-reading.org/
Small comp, Twitter entrants count. http://thefictionshelf.com/competition
Reader's Digest http://www.readersdigest.co.uk/magazine/212-Your-RD/1391-Your-Books.html
For the 'quirkier' amongst us. http://www.writersofthefuture.com/
From the U.S of A. http://thedailysatire.com/groups/satirical-short-story-competition/
Weekly Telegraphy comp £200. http://www.telegraph.co.uk/travel/travel-writing-competition/