I went to the complain online section @lowtide here www.bbc.co.uk/complaints/complain-online/ Just had an acknowledgement back so far saying the following:
"Thanks for contacting the BBC. This is to confirm we’ve received the attached complaint sent in this name. We’ve included the text of the complaint and a case reference for your records (see below).
Please don’t reply to this email because it’s an automated acknowledgement sent from an account which can’t receive replies. If you do need to get in touch, please use our webform instead at www.bbc.co.uk/complaints, quoting your reference number.
We’ll normally include the text below in our overnight report to producers and management of all the complaints and other reaction we receive today (with your personal details removed). This means it will reach the right people by tomorrow morning.
We’ll do our best to reply as soon as we can, but the time needed depends on the nature of your complaint. If we can’t reply as soon as we’d like (usually within 10 working days) we’ll let you know. For full details of our complaints process please visit: www.bbc.co.uk/complaints/handle-complaint/."
So I guess the more people who complain the better.