In terms of your Complaint, we suggest describing the events in the order they happened, and explaining what your concerns is when you reach that stage.
We have provided screenshots of the 5 simple questions you are asked when you submit a complaints via our Complaints Portal, so we suggest preparing these answers in advance, so you don't feel under pressure to think of what you are going to say on the spur of the moment.
Planning ahead will allow you to take your time and make sure you explain everything that you feel is an issue.
If you have multiple concerns, do consider making a submission for each one to make it easier on yourself.

The Complaints Portal is set up so that you can submit as many Complaints as you need. These can be to different Trust / Providers, or different areas of concern. 
We suggest using this feature when submitting any large of complex complaints. This allows each concern to be submitted separately, allowing you to manage your time and capacity as we know complaints can be stressful and emotional.
This is something we are advising based on our experiences during our testing phase. We noticed that when inputting the details of a complaint, it can make emotions resurface, and cause stress or anxiety. We found that breaking a large of complex complaint into smaller, manageable chunks really helped to remain in control of this.
It allowed us to return back to the Complaints Portal at a time when we felt able to continue with the next part, so we didn't feel as overwhelmed whilst trying to input everything all at once.
Preparing to make the submissions was also really useful for us, and helped bring all the elements we had concerns about together.
Finally, when there are multiple concerns, submitting these separately does help with identifying which areas of concerns are causing the greatest amount of concern to patients. The data we can extract will inevitably be more meaningful and therefore more useful in advocating for improvements, when it is separated into those key areas of concern.
Whilst Keeping the NHS Honest is a non-profit, self-funded voluntary group, we understand that complaints can be stressful, and using something new like our Complaints Portal may be daunting.
We have tried to make it as easy to use as we can, and kept things nice and simple, but sometime we still need some help.
We have an email address associated with the Complaints Portal Queries.KTNH@gmail.com that you can reach us on regarding this. We may not answer straight away, as we are just volunteers, but we will get back to you, and do our best to help.