Legal Advice
If you believe that you or your child have suffered due to negligence of a medical professional, please seek legal advice.
I can personally recommend Leigh Day & Co http://www.leighday.co.uk/. The advice and support I have received during Caitlin's inquest was second to none.
There are many solicitors out there that carry out investigative work, and you may be able to get Legal Aid to fund it for you if you qualify.