Hello again!
That sounds really good that the manager has been so good about getting things organised.
To be honest, it's good for me, also in a selfish way, to feel reassured that I'm also not mad. 
I suppose the thing we have to bear in mind is that when they are in a nursery or school environment, they will be exposed to some things that even the staff can't guarantee against. Unfortunately, I've had to accept that accidents will happen. With my DD's school, I do feel as confident as I ever will that they try and do their best for my DD to keep her safe. She also has odd reactions that have no explanation, and that's at home with me and my ridiculous efforts to be careful. No school can accommodate what I do at home, so it's really important that I feel confident in them, if that makes sense.
I don't k ow where you are but under NHS choices you are able to ask your GP to refer you to an allergy clinic. I know not all areas of the UK are served by such clinics, but if you call Allergy UK they should be able to give you details of your nearest one. You can then go and ask your gp for a referral to that specific one.
My Dd was under the care of the local hospital dieticians who were lovely but not experienced in multiple allergies. In the end, I asked to be referred to a London hospital and you're right the care has been really good. The best part is the fact that I can ask the nurse things by email. She really is amazing!
The care is brilliant but they have no answers to will she outgrow her allergies or the multitude of other questions I have. She is seen annually, they do skin prick tests. They have done 2 lots of blood tests (rast). We are going back in a couple of weeks for this years appointment. I have to rein in my anticipation and hopes that she will have outgrown some of them. Every year i take DD, really hoping that some food will have become safe but So far the list has grown. but they tell me she still might grow out of some.
Sorry, I'm waffling. Really pleased that the manager is taking good care in organising everything. 