There is a clear set of rules that determines which organisation is your designated body. The rules are based on regulations and you cannot choose who will be your designated body or responsible officer.
The GMC has developed an online help tool to help you find which organisation is your prescribed designated body.
For the majority of doctors in clinical informatics, it will be straightforward and your designated body will be your employer (NHS Trust, board, agency, or similar). This means that as you change employment over the years it is likely that your designated body will also change. It is important that you keep the GMC informed of any changes.
A small number of doctors in health informatics may not have a prescribed designated body. If you are unsure, you should work through the GMC tool and if you do not identify a prescribed designated body you will reach a set of questions including, “Are you currently a Health Informatics Practitioner?” If you can say “Yes” to this (and “No” to all the preceding question sets) then you will be taken to a statement informing you that you may be able to connect to a suitable person who can act as your responsible officer.
It is important to note that you can only connect to a suitable person to act as your responsible officer if you do not have a designated body prescribed in regulations, so you should follow the GMC tool carefully. Clicking on the link to the list of approved suitable persons and scrolling down will find the contact details of John Woodhouse who is a suitable person for Health Informaticians.