Here are a couple more prodcos to add to this list:
Masterplan Film Productions - Masterplan Film Productions Ltd operates an open door policy for submissions, however we do ask that you send an initial email introducing yourself and your project before sending any attachments to us; we will then provide you with an unpublished email address to send your files to.
For general queries or to introduce you and your project to Masterplan: firstname.lastname@example.org
Tight Rope Pictures - Unsolicited scripts may be sent to us and we will endeavour to respond as soon as possible. Please note this can take a while – we’re a small company and we don’t use external readers. If you would like us to return your script, please enclose a stamped self-addressed envelope with your submission.
It’s all gravy, as someone might have once said.