I can't feeling that if you were to try an opportunity like this it would be more likely to succeed than the emailed one act play opportunities.
Sparks is being run by the Menagerie Theatre (confusingly the festival where they will be shown is called Hotbed).
The work can be a one act play or a full play. It says it has to be a professional standard, but that's a given, isn't it?
They can only have a maximum of 6 performers.
Send scripts to:
Cassie Bradnack
Menagerie
Eastern Court
182-190 Newmarket Road
Cambridge
CB5 8HE
More info at:
http://www.menagerietheatre.co.uk/writer-development/sparks/