Yeah - I apologise for dredging up this lot again, but don't they promise to send an acknowledgment card once they've received material?
According to their site (http://www.bbc.co.uk/writersroom/writing/writersroom_flow.shtml) they ask us to contact them if aforementioned card doesn't arrive within a month, but they don't suggest how you can contact them.
So, two questions:
1. Have others found their one month acknowledgment actually happens?
2. Do we have any other way of contacting them other than just sending another letter? I know they try to keep us at arms length, but still...