Well, I saw the link for this on BBC Writersroom, promptly posted it on Twitter, then somebody informed me that the deadline was next day (today - Friday). Must pay more attention in future. Of course, I didn't have time to write anything new, but seeing as they seemed to be looking for a story premise rather than a fully fledged script, I sorted through my story files and sent two to them last night.
The prize is a free place on a Script Factory course of your choice. That would be quite nice.
I don't think I'll have a chance, but hey, at least I sent something, and you never know.