OK, excepting Penguin UK (which opened up for direct submissions for a limited time) there are now 77 UK publishers linked in the sidebar headed U.K. Publishers Who Accept Submissions.
I know there are more out there, but they're swamped, or taking a breather while they re-assess their situation in the scheme of things.
Again, I will remind you that those listed are not fly-by-night (love that expression) enterprises (however, should your experience tell you otherwise please let me know) but genuine outfits concerned to promote their vision of good writing in print format.
You know the ropes - if not, make it your duty to learn the ropes. Do not send stuff you are unconvinced is a match for the particular imprint. Doing so makes you look silly, gums up the works for everyone else thinking of approaching them and generally pisses people off.
Read the submission guidelines. Research the publisher, imprint, commissioning editor. Find their blog, if they have one. Familiarise yourself with their policies, their foibles, their needs, their desires. Then compile your submission package.
Among the new links you'll find The Fiction Desk, specialists in short stories lovingly bound in soft cover and offered on subscription. They have some brilliant writers on board. I may very well forward them some stuff, but only after I've done a bit more homework.
If new to the blog find 'about this blog' in the Index and read it. Or: a) Search the Index and find the most appropriate category for what you hope to find. b) Scroll down and search for links in the various categories in the sidebar, e.g. Literary Agents' blogs; Editors' blogs; U.S. Literary Agents' websites; Critique sites etc. c) Leave a friendly or encouraging comment, and/or a link to a resource you think I should check out. d) Go to the Clueless, ink shop in the sidebar and buy stuff mentioned in the posts.