This free entry writing contest offers a £50 book voucher as a prize. They want hallowe'en stories of between 350 and 3,000 words, which mention self storage in some way. UK residents only.
I do like a competition with a theme or a prompt and I'll have finished reading all the books I already have sometime in the next couple of decades, so I think I'll be giving this one a try.
Update. I contacted the organisers to ask whether it would only be winning stories which they'll share on social media. They've replied to say other stories may be used as well.