To complain at the nursery and how?

[Hocuspoc]

My toddler has had 3 accidents in his nursery within 3 weeks time. It was always a head injury and always witnessed by the same lady.
We are generally very happy with this nursery, the teachers are so lovely and I was feeling safe leaving him there knowing they take good care and he is happy.
However lately they had few leavers and started mixing staff across different rooms. I found we were actually really lucky having a set of amazing and dedicated teachers because some new additions we've seen in the past month is just...
There is this lady in particular who barely speaks, looks completely deshoveled and sits in the corner staring at the distance. As I said, our boy fell 3 times in recent period bumping his head while he was at her care, and he had cuts or bruising.
I don't feel safe leaving him there any more. I am worried to speak up and point fingers at this one person because I am worried she may take it out on him by being even less caring or even unpleasant.
What does one do in this situation...
I like the nursery and everyone else there...

Talk to the manager, discreetly. Maybe by phone if it's easier. I work in this area and sadly we have seen some low quality staff being hired in times of desperation, and that's putting things politely. The manager should know what's going on and how you feel. Accidents can happen with the best of supervision but the way this woman seems disengaged suggests she isn't supervising adequately. This could put not just your child in danger but lead to breaches of standards which needs to be taken seriously by management. I would hope if they had to tell this woman there was a complaint then they wouldn't say who made it. Also if she is likely to take it out on a child then she absolutely shouldn't be working with children at all. Definitely don't let it lie OP. That's just not good enough.

Agree with @Alalalalalongalalalalalonglonglilong. Speak to the manager in person or by phone and explain your concerns that your child has had 3 similar accidents, and that the staff member’s appearance is that she’s not alert.

You should expect to be given more details of how the accidents happened and what, if anything, the staff member is doing to prevent further accidents. Is she engaging with the children during the day? Who is supervising her and how often does a senior staff member observe her work?

Nurseries are used to these issues with parents and you should expect a full and open response.

I found it hard to get the message across tbh, tried talking to the lady who was with him, very politely to find out more about how it happened - no passing judgement. She just played dumb repeating one sentence how it was an accident and almost appeared offended I am asking about it at all ...just odd attitude