There isn't long to go until this competition closes. There's no theme though, so you may have something you can polish up and send off. The prize is £300.
Only those who've never been published, nor won a writing competition, may enter.
If you're fairly new to writing, or are returning to it after a break, or are struggling with motivation, you may find the book From Story Idea to Reader helpful. I think it's excellent, but don't take my word for it - read these reviews for the audible version (most of them are on the .com version).
The book is also available in paperbook and ebook forms and can be borrowed from some UK libraries.