MAIN SITES USED FOR RESEARCH:
https://www.slideshare.net/iainbruce/screenplay-commissioning
https://www.slideshare.net/jackmaton1/the-commissioning-process-of-script-writing
https://hollysaltfilm.weebly.com/presentation1.html
https://vacherfilms.weebly.com/uploads/9/1/6/0/91607940/working_as_a_writer__1_.pdf
https://en.wikipedia.org/wiki/Spec_script
https://www.slideshare.net/jackmaton1/the-commissioning-process-of-script-writing
https://hollysaltfilm.weebly.com/presentation1.html
https://vacherfilms.weebly.com/uploads/9/1/6/0/91607940/working_as_a_writer__1_.pdf
https://en.wikipedia.org/wiki/Spec_script