The SENCO has replied to my email with this:
"Hi xxxxx (my name),
Thank you for your response.
I am confirm that I have briefly spoke with our principal and I am duly authorised to respond to this enquiry on her behalf.
We would like to express our disappointment at your decision to notify the ICO of this matter. As I explained in my previous email we have taken all sensible precautions and have this matter under control and there is absolutely no need to worry.
The college is not obliged to divulge details of how our team obtained details of xxx's (my daughter's name) birth family. The following details may have been disclosed but is not limited to the below:
Details of the incidents leading to the exclusion.
Notification of the exclusion.
Details of xxx's SEN.
Once again, the college is not obliged to divulge whether or not any other confidential and/or potentially identifying details have been disclosed to xxx's (my daughter's name) birth family.
I am able to inform you that contact with xxx's birth family was made via 3 emails and 1 phone conversation with birth mum.
As I informed yourselves yesterday the college has taken all sensible precautions and has this matter under full control. Precautions that we have taken include requesting that xxx's birth family dispose of any emails from ourselves and we have requested that birth mum and the wider family do not act on any of these details in a way which may negatively impact yourselves. We have made note for future reference that all communication regarding xxx (my daughter) comes through yourself.
Once again, we hope this is able to reassure you that we have this in hand and there is no need to worry. We fully appreciate you may have concerns about safeguarding xxx (my daughter) however we are dealing with this and there is no need to be concerned.
We understand that you may wish to continue with the appeal process as soon as possible, we will be in contact soon to arrange the next disciplinary appeal hearing where you will have the opportunity to contest the exclusion and we will come to a resolution.
Thank you,
xxxxx (name of the SENCO)"
They've ignored some of my questions! They haven't told me whether birth mum knows our contact details or our address etc.!
I've replied again asking for the principal to contact me and a meeting to be arranged as a matter of urgency!
Can't they understand that even if they have asked birth mum to delete the emails, it doesn't mean she actually will delete them! And if she has deleted them what if she made notes of our details and what was said on the emails and the phone calls! And what if birth mum does act on the information even if they've told her not to! Why can't they understand how serious this is and how can they not understand that birth mum might not listen to them and keep the emails and act on the information etc.!