For the Weird Christmas story competition there are several prized of $50 and one of $75 for stories of 350 words, written to the provided prompts.
The Perito prize offers £200 for 'outstanding new short fiction of between 1000 and up to 2000 words'
Thanks to Alyson for the links to both of those.
If you write audio drama you could win £3,000 through the Imison Award. There's also a Tinniswood Award for the same form. I'm unsure about the prize for that one.
The Barbellion Prize is for 'an author whose work has best represented the experience of chronic illness and/or disability'. Last year's prize was £1,000.
The offers $1,500 for one act plays, or $3,000 for full length works.
*The cake, as well as being rather yummy and eaten onboard a ship which was not yet in service, is a great metaphor for the way I'm packing so much into a limited time.